Home / 20,665.28-28,518.12-11,233.85

Finding the Fourth Proportional to 20,665.28, 28,518.12 and 11,233.85

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Solution

The fourth proportional to 20,665.28, 28,518.12 and 11,233.85 is: 15,502.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.28 : 28,518.12 = 11,233.85 : x
  2. Step 2: Convert to fraction form
    20,665.28/28,518.12 = 11,233.85/x
  3. Step 3: Cross multiply
    20,665.28x = 28,518.12 × 11,233.85
  4. Step 4: Simplify right side
    20,665.28x = 320,368,139.77
  5. Step 5: Solve for x
    x = 320,368,139.77/20,665.28
  6. Step 6: Final answer
    x = 15,502.72

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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.