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Finding the Fourth Proportional to 8,708.81, 13,065.10 and 2,865.20

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Solution

The fourth proportional to 8,708.81, 13,065.10 and 2,865.20 is: 4,298.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.81 : 13,065.10 = 2,865.20 : x
  2. Step 2: Convert to fraction form
    8,708.81/13,065.10 = 2,865.20/x
  3. Step 3: Cross multiply
    8,708.81x = 13,065.10 × 2,865.20
  4. Step 4: Simplify right side
    8,708.81x = 37,434,052.03
  5. Step 5: Solve for x
    x = 37,434,052.03/8,708.81
  6. Step 6: Final answer
    x = 4,298.41

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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.