Home / 20,181.40-27,831.02-15,392.85

Finding the Fourth Proportional to 20,181.40, 27,831.02 and 15,392.85

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Solution

The fourth proportional to 20,181.40, 27,831.02 and 15,392.85 is: 21,227.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,181.40 : 27,831.02 = 15,392.85 : x
  2. Step 2: Convert to fraction form
    20,181.40/27,831.02 = 15,392.85/x
  3. Step 3: Cross multiply
    20,181.40x = 27,831.02 × 15,392.85
  4. Step 4: Simplify right side
    20,181.40x = 428,398,716.21
  5. Step 5: Solve for x
    x = 428,398,716.21/20,181.40
  6. Step 6: Final answer
    x = 21,227.40

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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.