Home / 20,679.60-31,023.18-8,992.92

Finding the Fourth Proportional to 20,679.60, 31,023.18 and 8,992.92

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Solution

The fourth proportional to 20,679.60, 31,023.18 and 8,992.92 is: 13,491.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.60 : 31,023.18 = 8,992.92 : x
  2. Step 2: Convert to fraction form
    20,679.60/31,023.18 = 8,992.92/x
  3. Step 3: Cross multiply
    20,679.60x = 31,023.18 × 8,992.92
  4. Step 4: Simplify right side
    20,679.60x = 278,988,975.89
  5. Step 5: Solve for x
    x = 278,988,975.89/20,679.60
  6. Step 6: Final answer
    x = 13,491.02

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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.