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Finding the Fourth Proportional to 8,740.80, 12,055.20 and 8,011.92

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Solution

The fourth proportional to 8,740.80, 12,055.20 and 8,011.92 is: 11,049.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.80 : 12,055.20 = 8,011.92 : x
  2. Step 2: Convert to fraction form
    8,740.80/12,055.20 = 8,011.92/x
  3. Step 3: Cross multiply
    8,740.80x = 12,055.20 × 8,011.92
  4. Step 4: Simplify right side
    8,740.80x = 96,585,297.98
  5. Step 5: Solve for x
    x = 96,585,297.98/8,740.80
  6. Step 6: Final answer
    x = 11,049.94

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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.