Home / 15,012.18-20,717.60-8,639.73

Finding the Fourth Proportional to 15,012.18, 20,717.60 and 8,639.73

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Solution

The fourth proportional to 15,012.18, 20,717.60 and 8,639.73 is: 11,923.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.18 : 20,717.60 = 8,639.73 : x
  2. Step 2: Convert to fraction form
    15,012.18/20,717.60 = 8,639.73/x
  3. Step 3: Cross multiply
    15,012.18x = 20,717.60 × 8,639.73
  4. Step 4: Simplify right side
    15,012.18x = 178,994,470.25
  5. Step 5: Solve for x
    x = 178,994,470.25/15,012.18
  6. Step 6: Final answer
    x = 11,923.28

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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.