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Finding the Fourth Proportional to 28,901.71, 43,353.81 and 9,939.40

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Solution

The fourth proportional to 28,901.71, 43,353.81 and 9,939.40 is: 14,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,901.71 : 43,353.81 = 9,939.40 : x
  2. Step 2: Convert to fraction form
    28,901.71/43,353.81 = 9,939.40/x
  3. Step 3: Cross multiply
    28,901.71x = 43,353.81 × 9,939.40
  4. Step 4: Simplify right side
    28,901.71x = 430,910,859.11
  5. Step 5: Solve for x
    x = 430,910,859.11/28,901.71
  6. Step 6: Final answer
    x = 14,909.53

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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.