Home / 21,831.26-30,127.14-12,399.82

Finding the Fourth Proportional to 21,831.26, 30,127.14 and 12,399.82

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Solution

The fourth proportional to 21,831.26, 30,127.14 and 12,399.82 is: 17,111.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.26 : 30,127.14 = 12,399.82 : x
  2. Step 2: Convert to fraction form
    21,831.26/30,127.14 = 12,399.82/x
  3. Step 3: Cross multiply
    21,831.26x = 30,127.14 × 12,399.82
  4. Step 4: Simplify right side
    21,831.26x = 373,571,037.80
  5. Step 5: Solve for x
    x = 373,571,037.80/21,831.26
  6. Step 6: Final answer
    x = 17,111.75

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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.