Home / 13,831.20-20,746.80-8,301.60

Finding the Fourth Proportional to 13,831.20, 20,746.80 and 8,301.60

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Solution

The fourth proportional to 13,831.20, 20,746.80 and 8,301.60 is: 12,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.20 : 20,746.80 = 8,301.60 : x
  2. Step 2: Convert to fraction form
    13,831.20/20,746.80 = 8,301.60/x
  3. Step 3: Cross multiply
    13,831.20x = 20,746.80 × 8,301.60
  4. Step 4: Simplify right side
    13,831.20x = 172,231,634.88
  5. Step 5: Solve for x
    x = 172,231,634.88/13,831.20
  6. Step 6: Final answer
    x = 12,452.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.