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Finding the Fourth Proportional to 18,865.29, 28,304.06 and 9,003.28

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Solution

The fourth proportional to 18,865.29, 28,304.06 and 9,003.28 is: 13,507.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.29 : 28,304.06 = 9,003.28 : x
  2. Step 2: Convert to fraction form
    18,865.29/28,304.06 = 9,003.28/x
  3. Step 3: Cross multiply
    18,865.29x = 28,304.06 × 9,003.28
  4. Step 4: Simplify right side
    18,865.29x = 254,829,332.30
  5. Step 5: Solve for x
    x = 254,829,332.30/18,865.29
  6. Step 6: Final answer
    x = 13,507.84

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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.