Home / 15,013.48-20,717.92-8,639.80

Finding the Fourth Proportional to 15,013.48, 20,717.92 and 8,639.80

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Solution

The fourth proportional to 15,013.48, 20,717.92 and 8,639.80 is: 11,922.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.48 : 20,717.92 = 8,639.80 : x
  2. Step 2: Convert to fraction form
    15,013.48/20,717.92 = 8,639.80/x
  3. Step 3: Cross multiply
    15,013.48x = 20,717.92 × 8,639.80
  4. Step 4: Simplify right side
    15,013.48x = 178,998,685.22
  5. Step 5: Solve for x
    x = 178,998,685.22/15,013.48
  6. Step 6: Final answer
    x = 11,922.53

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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.