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Finding the Fourth Proportional to 28,599.68, 42,876.80 and 8,865.92

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Solution

The fourth proportional to 28,599.68, 42,876.80 and 8,865.92 is: 13,291.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,599.68 : 42,876.80 = 8,865.92 : x
  2. Step 2: Convert to fraction form
    28,599.68/42,876.80 = 8,865.92/x
  3. Step 3: Cross multiply
    28,599.68x = 42,876.80 × 8,865.92
  4. Step 4: Simplify right side
    28,599.68x = 380,142,278.66
  5. Step 5: Solve for x
    x = 380,142,278.66/28,599.68
  6. Step 6: Final answer
    x = 13,291.84

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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.