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Finding the Fourth Proportional to 8,660.56, 12,987.84 and 2,816.08

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Solution

The fourth proportional to 8,660.56, 12,987.84 and 2,816.08 is: 4,223.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.56 : 12,987.84 = 2,816.08 : x
  2. Step 2: Convert to fraction form
    8,660.56/12,987.84 = 2,816.08/x
  3. Step 3: Cross multiply
    8,660.56x = 12,987.84 × 2,816.08
  4. Step 4: Simplify right side
    8,660.56x = 36,574,796.47
  5. Step 5: Solve for x
    x = 36,574,796.47/8,660.56
  6. Step 6: Final answer
    x = 4,223.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.