Home / 20,108.66-27,747.16-13,398.62

Finding the Fourth Proportional to 20,108.66, 27,747.16 and 13,398.62

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Solution

The fourth proportional to 20,108.66, 27,747.16 and 13,398.62 is: 18,488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.66 : 27,747.16 = 13,398.62 : x
  2. Step 2: Convert to fraction form
    20,108.66/27,747.16 = 13,398.62/x
  3. Step 3: Cross multiply
    20,108.66x = 27,747.16 × 13,398.62
  4. Step 4: Simplify right side
    20,108.66x = 371,773,480.69
  5. Step 5: Solve for x
    x = 371,773,480.69/20,108.66
  6. Step 6: Final answer
    x = 18,488.23

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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.