Home / 19,221.20-28,831.80-8,125.02

Finding the Fourth Proportional to 19,221.20, 28,831.80 and 8,125.02

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Solution

The fourth proportional to 19,221.20, 28,831.80 and 8,125.02 is: 12,187.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,221.20 : 28,831.80 = 8,125.02 : x
  2. Step 2: Convert to fraction form
    19,221.20/28,831.80 = 8,125.02/x
  3. Step 3: Cross multiply
    19,221.20x = 28,831.80 × 8,125.02
  4. Step 4: Simplify right side
    19,221.20x = 234,258,951.64
  5. Step 5: Solve for x
    x = 234,258,951.64/19,221.20
  6. Step 6: Final answer
    x = 12,187.53

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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.