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Finding the Fourth Proportional to 8,585.82, 12,879.18 and 2,742.90

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Solution

The fourth proportional to 8,585.82, 12,879.18 and 2,742.90 is: 4,114.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.82 : 12,879.18 = 2,742.90 : x
  2. Step 2: Convert to fraction form
    8,585.82/12,879.18 = 2,742.90/x
  3. Step 3: Cross multiply
    8,585.82x = 12,879.18 × 2,742.90
  4. Step 4: Simplify right side
    8,585.82x = 35,326,302.82
  5. Step 5: Solve for x
    x = 35,326,302.82/8,585.82
  6. Step 6: Final answer
    x = 4,114.49

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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.