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Finding the Fourth Proportional to 57,747.80, 86,621.70 and 20,350.10

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Solution

The fourth proportional to 57,747.80, 86,621.70 and 20,350.10 is: 30,525.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,747.80 : 86,621.70 = 20,350.10 : x
  2. Step 2: Convert to fraction form
    57,747.80/86,621.70 = 20,350.10/x
  3. Step 3: Cross multiply
    57,747.80x = 86,621.70 × 20,350.10
  4. Step 4: Simplify right side
    57,747.80x = 1,762,760,257.17
  5. Step 5: Solve for x
    x = 1,762,760,257.17/57,747.80
  6. Step 6: Final answer
    x = 30,525.15

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Double scale
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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.