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Finding the Fourth Proportional to 28,473.96, 42,680.60 and 21,432.20

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Solution

The fourth proportional to 28,473.96, 42,680.60 and 21,432.20 is: 32,125.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,473.96 : 42,680.60 = 21,432.20 : x
  2. Step 2: Convert to fraction form
    28,473.96/42,680.60 = 21,432.20/x
  3. Step 3: Cross multiply
    28,473.96x = 42,680.60 × 21,432.20
  4. Step 4: Simplify right side
    28,473.96x = 914,738,834.76
  5. Step 5: Solve for x
    x = 914,738,834.76/28,473.96
  6. Step 6: Final answer
    x = 32,125.45

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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.