Home / 20,459.28-28,224.32-11,961.76

Finding the Fourth Proportional to 20,459.28, 28,224.32 and 11,961.76

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Solution

The fourth proportional to 20,459.28, 28,224.32 and 11,961.76 is: 16,501.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.28 : 28,224.32 = 11,961.76 : x
  2. Step 2: Convert to fraction form
    20,459.28/28,224.32 = 11,961.76/x
  3. Step 3: Cross multiply
    20,459.28x = 28,224.32 × 11,961.76
  4. Step 4: Simplify right side
    20,459.28x = 337,612,542.00
  5. Step 5: Solve for x
    x = 337,612,542.00/20,459.28
  6. Step 6: Final answer
    x = 16,501.68

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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.