Home / 28,456.77-42,685.17-7,680.27

Finding the Fourth Proportional to 28,456.77, 42,685.17 and 7,680.27

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Solution

The fourth proportional to 28,456.77, 42,685.17 and 7,680.27 is: 11,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.77 : 42,685.17 = 7,680.27 : x
  2. Step 2: Convert to fraction form
    28,456.77/42,685.17 = 7,680.27/x
  3. Step 3: Cross multiply
    28,456.77x = 42,685.17 × 7,680.27
  4. Step 4: Simplify right side
    28,456.77x = 327,833,630.60
  5. Step 5: Solve for x
    x = 327,833,630.60/28,456.77
  6. Step 6: Final answer
    x = 11,520.41

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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.