Home / 20,831.50-28,750.71-12,452.86

Finding the Fourth Proportional to 20,831.50, 28,750.71 and 12,452.86

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Solution

The fourth proportional to 20,831.50, 28,750.71 and 12,452.86 is: 17,186.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.50 : 28,750.71 = 12,452.86 : x
  2. Step 2: Convert to fraction form
    20,831.50/28,750.71 = 12,452.86/x
  3. Step 3: Cross multiply
    20,831.50x = 28,750.71 × 12,452.86
  4. Step 4: Simplify right side
    20,831.50x = 358,028,566.53
  5. Step 5: Solve for x
    x = 358,028,566.53/20,831.50
  6. Step 6: Final answer
    x = 17,186.88

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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.