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Finding the Fourth Proportional to 21,006,041.80, 31,509,062.70 and 21,006,041.80

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Solution

The fourth proportional to 21,006,041.80, 31,509,062.70 and 21,006,041.80 is: 31,509,062.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006,041.80 : 31,509,062.70 = 21,006,041.80 : x
  2. Step 2: Convert to fraction form
    21,006,041.80/31,509,062.70 = 21,006,041.80/x
  3. Step 3: Cross multiply
    21,006,041.80x = 31,509,062.70 × 21,006,041.80
  4. Step 4: Simplify right side
    21,006,041.80x = 661,880,688,155,020.88
  5. Step 5: Solve for x
    x = 661,880,688,155,020.88/21,006,041.80
  6. Step 6: Final answer
    x = 31,509,062.70

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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.