Home / 20,714.60-31,071.90-13,278.80

Finding the Fourth Proportional to 20,714.60, 31,071.90 and 13,278.80

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Solution

The fourth proportional to 20,714.60, 31,071.90 and 13,278.80 is: 19,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,714.60 : 31,071.90 = 13,278.80 : x
  2. Step 2: Convert to fraction form
    20,714.60/31,071.90 = 13,278.80/x
  3. Step 3: Cross multiply
    20,714.60x = 31,071.90 × 13,278.80
  4. Step 4: Simplify right side
    20,714.60x = 412,597,545.72
  5. Step 5: Solve for x
    x = 412,597,545.72/20,714.60
  6. Step 6: Final answer
    x = 19,918.20

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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.