Home / 20,781.42-31,312.40-17,164.68

Finding the Fourth Proportional to 20,781.42, 31,312.40 and 17,164.68

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Solution

The fourth proportional to 20,781.42, 31,312.40 and 17,164.68 is: 25,862.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.42 : 31,312.40 = 17,164.68 : x
  2. Step 2: Convert to fraction form
    20,781.42/31,312.40 = 17,164.68/x
  3. Step 3: Cross multiply
    20,781.42x = 31,312.40 × 17,164.68
  4. Step 4: Simplify right side
    20,781.42x = 537,467,326.03
  5. Step 5: Solve for x
    x = 537,467,326.03/20,781.42
  6. Step 6: Final answer
    x = 25,862.88

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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.