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Finding the Fourth Proportional to 28,591.38, 42,871.68 and 8,864.64

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Solution

The fourth proportional to 28,591.38, 42,871.68 and 8,864.64 is: 13,292.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,591.38 : 42,871.68 = 8,864.64 : x
  2. Step 2: Convert to fraction form
    28,591.38/42,871.68 = 8,864.64/x
  3. Step 3: Cross multiply
    28,591.38x = 42,871.68 × 8,864.64
  4. Step 4: Simplify right side
    28,591.38x = 380,042,009.40
  5. Step 5: Solve for x
    x = 380,042,009.40/28,591.38
  6. Step 6: Final answer
    x = 13,292.19

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1.5x scale

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.