Home / 21,257,663,500.80-31,886,495,251.20-7,278,639,436.80

Finding the Fourth Proportional to 21,257,663,500.80, 31,886,495,251.20 and 7,278,639,436.80

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Solution

The fourth proportional to 21,257,663,500.80, 31,886,495,251.20 and 7,278,639,436.80 is: 10,917,959,155.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257,663,500.80 : 31,886,495,251.20 = 7,278,639,436.80 : x
  2. Step 2: Convert to fraction form
    21,257,663,500.80/31,886,495,251.20 = 7,278,639,436.80/x
  3. Step 3: Cross multiply
    21,257,663,500.80x = 31,886,495,251.20 × 7,278,639,436.80
  4. Step 4: Simplify right side
    21,257,663,500.80x = 232,090,301,836,720,242,688
  5. Step 5: Solve for x
    x = 232,090,301,836,720,242,688/21,257,663,500.80
  6. Step 6: Final answer
    x = 10,917,959,155.20

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.