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Finding the Fourth Proportional to 12,488.32, 17,233.28 and 6,899.20

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Solution

The fourth proportional to 12,488.32, 17,233.28 and 6,899.20 is: 9,520.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.32 : 17,233.28 = 6,899.20 : x
  2. Step 2: Convert to fraction form
    12,488.32/17,233.28 = 6,899.20/x
  3. Step 3: Cross multiply
    12,488.32x = 17,233.28 × 6,899.20
  4. Step 4: Simplify right side
    12,488.32x = 118,895,845.38
  5. Step 5: Solve for x
    x = 118,895,845.38/12,488.32
  6. Step 6: Final answer
    x = 9,520.56

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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.