Home / 20,778.13-31,307.45-17,161.38

Finding the Fourth Proportional to 20,778.13, 31,307.45 and 17,161.38

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Solution

The fourth proportional to 20,778.13, 31,307.45 and 17,161.38 is: 25,857.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.13 : 31,307.45 = 17,161.38 : x
  2. Step 2: Convert to fraction form
    20,778.13/31,307.45 = 17,161.38/x
  3. Step 3: Cross multiply
    20,778.13x = 31,307.45 × 17,161.38
  4. Step 4: Simplify right side
    20,778.13x = 537,279,046.28
  5. Step 5: Solve for x
    x = 537,279,046.28/20,778.13
  6. Step 6: Final answer
    x = 25,857.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.