Home / 20,998.12-31,479.30-9,304.96

Finding the Fourth Proportional to 20,998.12, 31,479.30 and 9,304.96

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Solution

The fourth proportional to 20,998.12, 31,479.30 and 9,304.96 is: 13,949.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.12 : 31,479.30 = 9,304.96 : x
  2. Step 2: Convert to fraction form
    20,998.12/31,479.30 = 9,304.96/x
  3. Step 3: Cross multiply
    20,998.12x = 31,479.30 × 9,304.96
  4. Step 4: Simplify right side
    20,998.12x = 292,913,627.33
  5. Step 5: Solve for x
    x = 292,913,627.33/20,998.12
  6. Step 6: Final answer
    x = 13,949.52

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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.