Home / 39,139.12-54,012-21,234.12

Finding the Fourth Proportional to 39,139.12, 54,012 and 21,234.12

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Solution

The fourth proportional to 39,139.12, 54,012 and 21,234.12 is: 29,303.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.12 : 54,012 = 21,234.12 : x
  2. Step 2: Convert to fraction form
    39,139.12/54,012 = 21,234.12/x
  3. Step 3: Cross multiply
    39,139.12x = 54,012 × 21,234.12
  4. Step 4: Simplify right side
    39,139.12x = 1,146,897,289.44
  5. Step 5: Solve for x
    x = 1,146,897,289.44/39,139.12
  6. Step 6: Final answer
    x = 29,303.09

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.