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Finding the Fourth Proportional to 8,686.80, 13,020.60 and 4,525.20

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Solution

The fourth proportional to 8,686.80, 13,020.60 and 4,525.20 is: 6,782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.80 : 13,020.60 = 4,525.20 : x
  2. Step 2: Convert to fraction form
    8,686.80/13,020.60 = 4,525.20/x
  3. Step 3: Cross multiply
    8,686.80x = 13,020.60 × 4,525.20
  4. Step 4: Simplify right side
    8,686.80x = 58,920,819.12
  5. Step 5: Solve for x
    x = 58,920,819.12/8,686.80
  6. Step 6: Final answer
    x = 6,782.80

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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.