Home / 21,493.38-29,679.78-13,440.84

Finding the Fourth Proportional to 21,493.38, 29,679.78 and 13,440.84

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Solution

The fourth proportional to 21,493.38, 29,679.78 and 13,440.84 is: 18,560.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,493.38 : 29,679.78 = 13,440.84 : x
  2. Step 2: Convert to fraction form
    21,493.38/29,679.78 = 13,440.84/x
  3. Step 3: Cross multiply
    21,493.38x = 29,679.78 × 13,440.84
  4. Step 4: Simplify right side
    21,493.38x = 398,921,174.22
  5. Step 5: Solve for x
    x = 398,921,174.22/21,493.38
  6. Step 6: Final answer
    x = 18,560.19

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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.