Home / 19,917.38-29,864.56-11,920.12

Finding the Fourth Proportional to 19,917.38, 29,864.56 and 11,920.12

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Solution

The fourth proportional to 19,917.38, 29,864.56 and 11,920.12 is: 17,873.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.38 : 29,864.56 = 11,920.12 : x
  2. Step 2: Convert to fraction form
    19,917.38/29,864.56 = 11,920.12/x
  3. Step 3: Cross multiply
    19,917.38x = 29,864.56 × 11,920.12
  4. Step 4: Simplify right side
    19,917.38x = 355,989,138.95
  5. Step 5: Solve for x
    x = 355,989,138.95/19,917.38
  6. Step 6: Final answer
    x = 17,873.29

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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.