Home / 20,964.38-28,929.10-12,349.20

Finding the Fourth Proportional to 20,964.38, 28,929.10 and 12,349.20

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Solution

The fourth proportional to 20,964.38, 28,929.10 and 12,349.20 is: 17,040.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.38 : 28,929.10 = 12,349.20 : x
  2. Step 2: Convert to fraction form
    20,964.38/28,929.10 = 12,349.20/x
  3. Step 3: Cross multiply
    20,964.38x = 28,929.10 × 12,349.20
  4. Step 4: Simplify right side
    20,964.38x = 357,251,035.33
  5. Step 5: Solve for x
    x = 357,251,035.33/20,964.38
  6. Step 6: Final answer
    x = 17,040.86

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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.