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Finding the Fourth Proportional to 12,681.20, 17,500.86 and 7,092.20

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Solution

The fourth proportional to 12,681.20, 17,500.86 and 7,092.20 is: 9,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.20 : 17,500.86 = 7,092.20 : x
  2. Step 2: Convert to fraction form
    12,681.20/17,500.86 = 7,092.20/x
  3. Step 3: Cross multiply
    12,681.20x = 17,500.86 × 7,092.20
  4. Step 4: Simplify right side
    12,681.20x = 124,119,511.79
  5. Step 5: Solve for x
    x = 124,119,511.79/12,681.20
  6. Step 6: Final answer
    x = 9,787.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.