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Finding the Fourth Proportional to 15,398.66, 21,248.65 and 8,937.29

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Solution

The fourth proportional to 15,398.66, 21,248.65 and 8,937.29 is: 12,332.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.66 : 21,248.65 = 8,937.29 : x
  2. Step 2: Convert to fraction form
    15,398.66/21,248.65 = 8,937.29/x
  3. Step 3: Cross multiply
    15,398.66x = 21,248.65 × 8,937.29
  4. Step 4: Simplify right side
    15,398.66x = 189,905,347.16
  5. Step 5: Solve for x
    x = 189,905,347.16/15,398.66
  6. Step 6: Final answer
    x = 12,332.59

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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.