Home / 20,105.28-30,156.16-9,012.64

Finding the Fourth Proportional to 20,105.28, 30,156.16 and 9,012.64

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Solution

The fourth proportional to 20,105.28, 30,156.16 and 9,012.64 is: 13,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.28 : 30,156.16 = 9,012.64 : x
  2. Step 2: Convert to fraction form
    20,105.28/30,156.16 = 9,012.64/x
  3. Step 3: Cross multiply
    20,105.28x = 30,156.16 × 9,012.64
  4. Step 4: Simplify right side
    20,105.28x = 271,786,613.86
  5. Step 5: Solve for x
    x = 271,786,613.86/20,105.28
  6. Step 6: Final answer
    x = 13,518.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.