Home / 20,291.50-30,437.25-7,142.37

Finding the Fourth Proportional to 20,291.50, 30,437.25 and 7,142.37

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Solution

The fourth proportional to 20,291.50, 30,437.25 and 7,142.37 is: 10,713.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.50 : 30,437.25 = 7,142.37 : x
  2. Step 2: Convert to fraction form
    20,291.50/30,437.25 = 7,142.37/x
  3. Step 3: Cross multiply
    20,291.50x = 30,437.25 × 7,142.37
  4. Step 4: Simplify right side
    20,291.50x = 217,394,101.28
  5. Step 5: Solve for x
    x = 217,394,101.28/20,291.50
  6. Step 6: Final answer
    x = 10,713.56

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Double scale
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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.