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Finding the Fourth Proportional to 39,387.80, 59,057.88 and 15,698.98

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Solution

The fourth proportional to 39,387.80, 59,057.88 and 15,698.98 is: 23,538.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,387.80 : 59,057.88 = 15,698.98 : x
  2. Step 2: Convert to fraction form
    39,387.80/59,057.88 = 15,698.98/x
  3. Step 3: Cross multiply
    39,387.80x = 59,057.88 × 15,698.98
  4. Step 4: Simplify right side
    39,387.80x = 927,148,476.96
  5. Step 5: Solve for x
    x = 927,148,476.96/39,387.80
  6. Step 6: Final answer
    x = 23,538.98

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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.