Home / 20,966.20-31,449.30-7,115.32

Finding the Fourth Proportional to 20,966.20, 31,449.30 and 7,115.32

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Solution

The fourth proportional to 20,966.20, 31,449.30 and 7,115.32 is: 10,672.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.20 : 31,449.30 = 7,115.32 : x
  2. Step 2: Convert to fraction form
    20,966.20/31,449.30 = 7,115.32/x
  3. Step 3: Cross multiply
    20,966.20x = 31,449.30 × 7,115.32
  4. Step 4: Simplify right side
    20,966.20x = 223,771,833.28
  5. Step 5: Solve for x
    x = 223,771,833.28/20,966.20
  6. Step 6: Final answer
    x = 10,672.98

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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.