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Finding the Fourth Proportional to 8,862.80, 12,230.70 and 4,883.72

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Solution

The fourth proportional to 8,862.80, 12,230.70 and 4,883.72 is: 6,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,862.80 : 12,230.70 = 4,883.72 : x
  2. Step 2: Convert to fraction form
    8,862.80/12,230.70 = 4,883.72/x
  3. Step 3: Cross multiply
    8,862.80x = 12,230.70 × 4,883.72
  4. Step 4: Simplify right side
    8,862.80x = 59,731,314.20
  5. Step 5: Solve for x
    x = 59,731,314.20/8,862.80
  6. Step 6: Final answer
    x = 6,739.55

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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.