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Finding the Fourth Proportional to 16,988.31, 25,487.94 and 7,124.94

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Solution

The fourth proportional to 16,988.31, 25,487.94 and 7,124.94 is: 10,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,988.31 : 25,487.94 = 7,124.94 : x
  2. Step 2: Convert to fraction form
    16,988.31/25,487.94 = 7,124.94/x
  3. Step 3: Cross multiply
    16,988.31x = 25,487.94 × 7,124.94
  4. Step 4: Simplify right side
    16,988.31x = 181,600,007.60
  5. Step 5: Solve for x
    x = 181,600,007.60/16,988.31
  6. Step 6: Final answer
    x = 10,689.70

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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.