Home / 20,821.19-31,229.76-11,458.13

Finding the Fourth Proportional to 20,821.19, 31,229.76 and 11,458.13

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Solution

The fourth proportional to 20,821.19, 31,229.76 and 11,458.13 is: 17,186.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.19 : 31,229.76 = 11,458.13 : x
  2. Step 2: Convert to fraction form
    20,821.19/31,229.76 = 11,458.13/x
  3. Step 3: Cross multiply
    20,821.19x = 31,229.76 × 11,458.13
  4. Step 4: Simplify right side
    20,821.19x = 357,834,649.95
  5. Step 5: Solve for x
    x = 357,834,649.95/20,821.19
  6. Step 6: Final answer
    x = 17,186.08

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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.