Home / 20,622.62-28,459.21-11,191.18

Finding the Fourth Proportional to 20,622.62, 28,459.21 and 11,191.18

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Solution

The fourth proportional to 20,622.62, 28,459.21 and 11,191.18 is: 15,443.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.62 : 28,459.21 = 11,191.18 : x
  2. Step 2: Convert to fraction form
    20,622.62/28,459.21 = 11,191.18/x
  3. Step 3: Cross multiply
    20,622.62x = 28,459.21 × 11,191.18
  4. Step 4: Simplify right side
    20,622.62x = 318,492,236.15
  5. Step 5: Solve for x
    x = 318,492,236.15/20,622.62
  6. Step 6: Final answer
    x = 15,443.83

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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.