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Finding the Fourth Proportional to 8,590.95, 12,891.29 and 3,660.08

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Solution

The fourth proportional to 8,590.95, 12,891.29 and 3,660.08 is: 5,492.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.95 : 12,891.29 = 3,660.08 : x
  2. Step 2: Convert to fraction form
    8,590.95/12,891.29 = 3,660.08/x
  3. Step 3: Cross multiply
    8,590.95x = 12,891.29 × 3,660.08
  4. Step 4: Simplify right side
    8,590.95x = 47,183,069.95
  5. Step 5: Solve for x
    x = 47,183,069.95/8,590.95
  6. Step 6: Final answer
    x = 5,492.18

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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.