Home / 13,678.08-20,517.48-7,831.92

Finding the Fourth Proportional to 13,678.08, 20,517.48 and 7,831.92

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Solution

The fourth proportional to 13,678.08, 20,517.48 and 7,831.92 is: 11,748.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.08 : 20,517.48 = 7,831.92 : x
  2. Step 2: Convert to fraction form
    13,678.08/20,517.48 = 7,831.92/x
  3. Step 3: Cross multiply
    13,678.08x = 20,517.48 × 7,831.92
  4. Step 4: Simplify right side
    13,678.08x = 160,691,261.96
  5. Step 5: Solve for x
    x = 160,691,261.96/13,678.08
  6. Step 6: Final answer
    x = 11,748.09

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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.