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Finding the Fourth Proportional to 28,312.28, 42,468.52 and 8,591

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Solution

The fourth proportional to 28,312.28, 42,468.52 and 8,591 is: 12,886.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.28 : 42,468.52 = 8,591 : x
  2. Step 2: Convert to fraction form
    28,312.28/42,468.52 = 8,591/x
  3. Step 3: Cross multiply
    28,312.28x = 42,468.52 × 8,591
  4. Step 4: Simplify right side
    28,312.28x = 364,847,055.32
  5. Step 5: Solve for x
    x = 364,847,055.32/28,312.28
  6. Step 6: Final answer
    x = 12,886.53

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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.