Home / 20,349.78-28,082.42-11,397.22

Finding the Fourth Proportional to 20,349.78, 28,082.42 and 11,397.22

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Solution

The fourth proportional to 20,349.78, 28,082.42 and 11,397.22 is: 15,728.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,349.78 : 28,082.42 = 11,397.22 : x
  2. Step 2: Convert to fraction form
    20,349.78/28,082.42 = 11,397.22/x
  3. Step 3: Cross multiply
    20,349.78x = 28,082.42 × 11,397.22
  4. Step 4: Simplify right side
    20,349.78x = 320,061,518.87
  5. Step 5: Solve for x
    x = 320,061,518.87/20,349.78
  6. Step 6: Final answer
    x = 15,728.01

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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.