Home / 20,508.12-28,313.50-13,446.86

Finding the Fourth Proportional to 20,508.12, 28,313.50 and 13,446.86

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Solution

The fourth proportional to 20,508.12, 28,313.50 and 13,446.86 is: 18,564.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.12 : 28,313.50 = 13,446.86 : x
  2. Step 2: Convert to fraction form
    20,508.12/28,313.50 = 13,446.86/x
  3. Step 3: Cross multiply
    20,508.12x = 28,313.50 × 13,446.86
  4. Step 4: Simplify right side
    20,508.12x = 380,727,670.61
  5. Step 5: Solve for x
    x = 380,727,670.61/20,508.12
  6. Step 6: Final answer
    x = 18,564.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.