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Finding the Fourth Proportional to 28,591.08, 42,890.76 and 8,871.24

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Solution

The fourth proportional to 28,591.08, 42,890.76 and 8,871.24 is: 13,308.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,591.08 : 42,890.76 = 8,871.24 : x
  2. Step 2: Convert to fraction form
    28,591.08/42,890.76 = 8,871.24/x
  3. Step 3: Cross multiply
    28,591.08x = 42,890.76 × 8,871.24
  4. Step 4: Simplify right side
    28,591.08x = 380,494,225.74
  5. Step 5: Solve for x
    x = 380,494,225.74/28,591.08
  6. Step 6: Final answer
    x = 13,308.14

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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.