Home / 20,691.16-31,018.27-17,209.72

Finding the Fourth Proportional to 20,691.16, 31,018.27 and 17,209.72

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Solution

The fourth proportional to 20,691.16, 31,018.27 and 17,209.72 is: 25,799.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.16 : 31,018.27 = 17,209.72 : x
  2. Step 2: Convert to fraction form
    20,691.16/31,018.27 = 17,209.72/x
  3. Step 3: Cross multiply
    20,691.16x = 31,018.27 × 17,209.72
  4. Step 4: Simplify right side
    20,691.16x = 533,815,741.58
  5. Step 5: Solve for x
    x = 533,815,741.58/20,691.16
  6. Step 6: Final answer
    x = 25,799.22

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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.