Home / 10,639,947.20-15,959,920.80-7,280,715.20

Finding the Fourth Proportional to 10,639,947.20, 15,959,920.80 and 7,280,715.20

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Solution

The fourth proportional to 10,639,947.20, 15,959,920.80 and 7,280,715.20 is: 10,921,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639,947.20 : 15,959,920.80 = 7,280,715.20 : x
  2. Step 2: Convert to fraction form
    10,639,947.20/15,959,920.80 = 7,280,715.20/x
  3. Step 3: Cross multiply
    10,639,947.20x = 15,959,920.80 × 7,280,715.20
  4. Step 4: Simplify right side
    10,639,947.20x = 116,199,637,959,356.17
  5. Step 5: Solve for x
    x = 116,199,637,959,356.17/10,639,947.20
  6. Step 6: Final answer
    x = 10,921,072.80

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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.