Home / 20,157.38-27,824.93-13,440.55

Finding the Fourth Proportional to 20,157.38, 27,824.93 and 13,440.55

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Solution

The fourth proportional to 20,157.38, 27,824.93 and 13,440.55 is: 18,553.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157.38 : 27,824.93 = 13,440.55 : x
  2. Step 2: Convert to fraction form
    20,157.38/27,824.93 = 13,440.55/x
  3. Step 3: Cross multiply
    20,157.38x = 27,824.93 × 13,440.55
  4. Step 4: Simplify right side
    20,157.38x = 373,982,362.91
  5. Step 5: Solve for x
    x = 373,982,362.91/20,157.38
  6. Step 6: Final answer
    x = 18,553.12

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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.