Home / 21,540.09-29,726.01-13,043.79

Finding the Fourth Proportional to 21,540.09, 29,726.01 and 13,043.79

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Solution

The fourth proportional to 21,540.09, 29,726.01 and 13,043.79 is: 18,000.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.09 : 29,726.01 = 13,043.79 : x
  2. Step 2: Convert to fraction form
    21,540.09/29,726.01 = 13,043.79/x
  3. Step 3: Cross multiply
    21,540.09x = 29,726.01 × 13,043.79
  4. Step 4: Simplify right side
    21,540.09x = 387,739,831.98
  5. Step 5: Solve for x
    x = 387,739,831.98/21,540.09
  6. Step 6: Final answer
    x = 18,000.85

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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.