Home / 20,652.20-28,500.12-11,220.77

Finding the Fourth Proportional to 20,652.20, 28,500.12 and 11,220.77

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Solution

The fourth proportional to 20,652.20, 28,500.12 and 11,220.77 is: 15,484.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.20 : 28,500.12 = 11,220.77 : x
  2. Step 2: Convert to fraction form
    20,652.20/28,500.12 = 11,220.77/x
  3. Step 3: Cross multiply
    20,652.20x = 28,500.12 × 11,220.77
  4. Step 4: Simplify right side
    20,652.20x = 319,793,291.49
  5. Step 5: Solve for x
    x = 319,793,291.49/20,652.20
  6. Step 6: Final answer
    x = 15,484.71

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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.