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Finding the Fourth Proportional to 28,591.79, 42,877.15 and 9,867.05

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Solution

The fourth proportional to 28,591.79, 42,877.15 and 9,867.05 is: 14,796.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,591.79 : 42,877.15 = 9,867.05 : x
  2. Step 2: Convert to fraction form
    28,591.79/42,877.15 = 9,867.05/x
  3. Step 3: Cross multiply
    28,591.79x = 42,877.15 × 9,867.05
  4. Step 4: Simplify right side
    28,591.79x = 423,070,743.85
  5. Step 5: Solve for x
    x = 423,070,743.85/28,591.79
  6. Step 6: Final answer
    x = 14,796.93

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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.