Home / 21,391.40-29,519.16-11,831.38

Finding the Fourth Proportional to 21,391.40, 29,519.16 and 11,831.38

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Solution

The fourth proportional to 21,391.40, 29,519.16 and 11,831.38 is: 16,326.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.40 : 29,519.16 = 11,831.38 : x
  2. Step 2: Convert to fraction form
    21,391.40/29,519.16 = 11,831.38/x
  3. Step 3: Cross multiply
    21,391.40x = 29,519.16 × 11,831.38
  4. Step 4: Simplify right side
    21,391.40x = 349,252,399.24
  5. Step 5: Solve for x
    x = 349,252,399.24/21,391.40
  6. Step 6: Final answer
    x = 16,326.77

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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.