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Finding the Fourth Proportional to 18,965, 28,434.54 and 11,572.04

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Solution

The fourth proportional to 18,965, 28,434.54 and 11,572.04 is: 17,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965 : 28,434.54 = 11,572.04 : x
  2. Step 2: Convert to fraction form
    18,965/28,434.54 = 11,572.04/x
  3. Step 3: Cross multiply
    18,965x = 28,434.54 × 11,572.04
  4. Step 4: Simplify right side
    18,965x = 329,045,634.26
  5. Step 5: Solve for x
    x = 329,045,634.26/18,965
  6. Step 6: Final answer
    x = 17,350.15

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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.