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Finding the Fourth Proportional to 13,681,660.80, 20,509,660.80 and 5,167,718.40

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Solution

The fourth proportional to 13,681,660.80, 20,509,660.80 and 5,167,718.40 is: 7,746,731.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681,660.80 : 20,509,660.80 = 5,167,718.40 : x
  2. Step 2: Convert to fraction form
    13,681,660.80/20,509,660.80 = 5,167,718.40/x
  3. Step 3: Cross multiply
    13,681,660.80x = 20,509,660.80 × 5,167,718.40
  4. Step 4: Simplify right side
    13,681,660.80x = 105,988,151,493,918.73
  5. Step 5: Solve for x
    x = 105,988,151,493,918.73/13,681,660.80
  6. Step 6: Final answer
    x = 7,746,731.41

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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.