Home / 8,288.80-12,380.47-7,122.20

Finding the Fourth Proportional to 8,288.80, 12,380.47 and 7,122.20

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Solution

The fourth proportional to 8,288.80, 12,380.47 and 7,122.20 is: 10,637.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,288.80 : 12,380.47 = 7,122.20 : x
  2. Step 2: Convert to fraction form
    8,288.80/12,380.47 = 7,122.20/x
  3. Step 3: Cross multiply
    8,288.80x = 12,380.47 × 7,122.20
  4. Step 4: Simplify right side
    8,288.80x = 88,176,103.73
  5. Step 5: Solve for x
    x = 88,176,103.73/8,288.80
  6. Step 6: Final answer
    x = 10,637.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.