Home / 20,142.30-30,213.45-19,710.30

Finding the Fourth Proportional to 20,142.30, 30,213.45 and 19,710.30

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Solution

The fourth proportional to 20,142.30, 30,213.45 and 19,710.30 is: 29,565.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.30 : 30,213.45 = 19,710.30 : x
  2. Step 2: Convert to fraction form
    20,142.30/30,213.45 = 19,710.30/x
  3. Step 3: Cross multiply
    20,142.30x = 30,213.45 × 19,710.30
  4. Step 4: Simplify right side
    20,142.30x = 595,516,163.54
  5. Step 5: Solve for x
    x = 595,516,163.54/20,142.30
  6. Step 6: Final answer
    x = 29,565.45

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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.