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Finding the Fourth Proportional to 28,191.60, 42,287.40 and 8,473.20

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Solution

The fourth proportional to 28,191.60, 42,287.40 and 8,473.20 is: 12,709.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191.60 : 42,287.40 = 8,473.20 : x
  2. Step 2: Convert to fraction form
    28,191.60/42,287.40 = 8,473.20/x
  3. Step 3: Cross multiply
    28,191.60x = 42,287.40 × 8,473.20
  4. Step 4: Simplify right side
    28,191.60x = 358,309,597.68
  5. Step 5: Solve for x
    x = 358,309,597.68/28,191.60
  6. Step 6: Final answer
    x = 12,709.80

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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.