Home / 15,011.18-20,716.22-8,638.73

Finding the Fourth Proportional to 15,011.18, 20,716.22 and 8,638.73

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Solution

The fourth proportional to 15,011.18, 20,716.22 and 8,638.73 is: 11,921.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.18 : 20,716.22 = 8,638.73 : x
  2. Step 2: Convert to fraction form
    15,011.18/20,716.22 = 8,638.73/x
  3. Step 3: Cross multiply
    15,011.18x = 20,716.22 × 8,638.73
  4. Step 4: Simplify right side
    15,011.18x = 178,961,831.20
  5. Step 5: Solve for x
    x = 178,961,831.20/15,011.18
  6. Step 6: Final answer
    x = 11,921.90

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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.