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Finding the Fourth Proportional to 28,319.31, 42,478.61 and 8,597.12

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Solution

The fourth proportional to 28,319.31, 42,478.61 and 8,597.12 is: 12,895.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.31 : 42,478.61 = 8,597.12 : x
  2. Step 2: Convert to fraction form
    28,319.31/42,478.61 = 8,597.12/x
  3. Step 3: Cross multiply
    28,319.31x = 42,478.61 × 8,597.12
  4. Step 4: Simplify right side
    28,319.31x = 365,193,452.22
  5. Step 5: Solve for x
    x = 365,193,452.22/28,319.31
  6. Step 6: Final answer
    x = 12,895.56

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Similar ratio
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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.