Home / 15,831.20-21,845.60-8,757.44

Finding the Fourth Proportional to 15,831.20, 21,845.60 and 8,757.44

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Solution

The fourth proportional to 15,831.20, 21,845.60 and 8,757.44 is: 12,084.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,831.20 : 21,845.60 = 8,757.44 : x
  2. Step 2: Convert to fraction form
    15,831.20/21,845.60 = 8,757.44/x
  3. Step 3: Cross multiply
    15,831.20x = 21,845.60 × 8,757.44
  4. Step 4: Simplify right side
    15,831.20x = 191,311,531.26
  5. Step 5: Solve for x
    x = 191,311,531.26/15,831.20
  6. Step 6: Final answer
    x = 12,084.46

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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.