Home / 20,658.12-28,508.13-11,226.66

Finding the Fourth Proportional to 20,658.12, 28,508.13 and 11,226.66

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Solution

The fourth proportional to 20,658.12, 28,508.13 and 11,226.66 is: 15,492.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.12 : 28,508.13 = 11,226.66 : x
  2. Step 2: Convert to fraction form
    20,658.12/28,508.13 = 11,226.66/x
  3. Step 3: Cross multiply
    20,658.12x = 28,508.13 × 11,226.66
  4. Step 4: Simplify right side
    20,658.12x = 320,051,082.75
  5. Step 5: Solve for x
    x = 320,051,082.75/20,658.12
  6. Step 6: Final answer
    x = 15,492.75

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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.