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Finding the Fourth Proportional to 28,747.92, 43,110.20 and 9,020.40

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Solution

The fourth proportional to 28,747.92, 43,110.20 and 9,020.40 is: 13,526.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,747.92 : 43,110.20 = 9,020.40 : x
  2. Step 2: Convert to fraction form
    28,747.92/43,110.20 = 9,020.40/x
  3. Step 3: Cross multiply
    28,747.92x = 43,110.20 × 9,020.40
  4. Step 4: Simplify right side
    28,747.92x = 388,871,248.08
  5. Step 5: Solve for x
    x = 388,871,248.08/28,747.92
  6. Step 6: Final answer
    x = 13,526.94

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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.