Home / 20,143.09-30,263.39-17,781.13

Finding the Fourth Proportional to 20,143.09, 30,263.39 and 17,781.13

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Solution

The fourth proportional to 20,143.09, 30,263.39 and 17,781.13 is: 26,714.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.09 : 30,263.39 = 17,781.13 : x
  2. Step 2: Convert to fraction form
    20,143.09/30,263.39 = 17,781.13/x
  3. Step 3: Cross multiply
    20,143.09x = 30,263.39 × 17,781.13
  4. Step 4: Simplify right side
    20,143.09x = 538,117,287.43
  5. Step 5: Solve for x
    x = 538,117,287.43/20,143.09
  6. Step 6: Final answer
    x = 26,714.73

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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.