Home / 12,831.40-17,711.22-8,117.20

Finding the Fourth Proportional to 12,831.40, 17,711.22 and 8,117.20

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Solution

The fourth proportional to 12,831.40, 17,711.22 and 8,117.20 is: 11,204.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,831.40 : 17,711.22 = 8,117.20 : x
  2. Step 2: Convert to fraction form
    12,831.40/17,711.22 = 8,117.20/x
  3. Step 3: Cross multiply
    12,831.40x = 17,711.22 × 8,117.20
  4. Step 4: Simplify right side
    12,831.40x = 143,765,514.98
  5. Step 5: Solve for x
    x = 143,765,514.98/12,831.40
  6. Step 6: Final answer
    x = 11,204.20

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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.