Home / 21,571.43-29,760.30-13,391.20

Finding the Fourth Proportional to 21,571.43, 29,760.30 and 13,391.20

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Solution

The fourth proportional to 21,571.43, 29,760.30 and 13,391.20 is: 18,474.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,571.43 : 29,760.30 = 13,391.20 : x
  2. Step 2: Convert to fraction form
    21,571.43/29,760.30 = 13,391.20/x
  3. Step 3: Cross multiply
    21,571.43x = 29,760.30 × 13,391.20
  4. Step 4: Simplify right side
    21,571.43x = 398,526,148.77
  5. Step 5: Solve for x
    x = 398,526,148.77/21,571.43
  6. Step 6: Final answer
    x = 18,474.72

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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.