Home / 15,820.20-21,831.48-9,105.66

Finding the Fourth Proportional to 15,820.20, 21,831.48 and 9,105.66

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Solution

The fourth proportional to 15,820.20, 21,831.48 and 9,105.66 is: 12,565.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.20 : 21,831.48 = 9,105.66 : x
  2. Step 2: Convert to fraction form
    15,820.20/21,831.48 = 9,105.66/x
  3. Step 3: Cross multiply
    15,820.20x = 21,831.48 × 9,105.66
  4. Step 4: Simplify right side
    15,820.20x = 198,790,034.18
  5. Step 5: Solve for x
    x = 198,790,034.18/15,820.20
  6. Step 6: Final answer
    x = 12,565.58

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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.