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Finding the Fourth Proportional to 8,758.57, 13,129.65 and 3,210.42

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Solution

The fourth proportional to 8,758.57, 13,129.65 and 3,210.42 is: 4,812.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.57 : 13,129.65 = 3,210.42 : x
  2. Step 2: Convert to fraction form
    8,758.57/13,129.65 = 3,210.42/x
  3. Step 3: Cross multiply
    8,758.57x = 13,129.65 × 3,210.42
  4. Step 4: Simplify right side
    8,758.57x = 42,151,690.95
  5. Step 5: Solve for x
    x = 42,151,690.95/8,758.57
  6. Step 6: Final answer
    x = 4,812.62

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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.