Home / 20,349.88-28,082.12-11,397.12

Finding the Fourth Proportional to 20,349.88, 28,082.12 and 11,397.12

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Solution

The fourth proportional to 20,349.88, 28,082.12 and 11,397.12 is: 15,727.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,349.88 : 28,082.12 = 11,397.12 : x
  2. Step 2: Convert to fraction form
    20,349.88/28,082.12 = 11,397.12/x
  3. Step 3: Cross multiply
    20,349.88x = 28,082.12 × 11,397.12
  4. Step 4: Simplify right side
    20,349.88x = 320,055,291.49
  5. Step 5: Solve for x
    x = 320,055,291.49/20,349.88
  6. Step 6: Final answer
    x = 15,727.63

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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.