Home / 20,221.95-27,909.66-11,729.10

Finding the Fourth Proportional to 20,221.95, 27,909.66 and 11,729.10

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Solution

The fourth proportional to 20,221.95, 27,909.66 and 11,729.10 is: 16,188.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.95 : 27,909.66 = 11,729.10 : x
  2. Step 2: Convert to fraction form
    20,221.95/27,909.66 = 11,729.10/x
  3. Step 3: Cross multiply
    20,221.95x = 27,909.66 × 11,729.10
  4. Step 4: Simplify right side
    20,221.95x = 327,355,341.75
  5. Step 5: Solve for x
    x = 327,355,341.75/20,221.95
  6. Step 6: Final answer
    x = 16,188.12

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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.