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Finding the Fourth Proportional to 8,590.12, 12,890.04 and 3,659.24

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Solution

The fourth proportional to 8,590.12, 12,890.04 and 3,659.24 is: 5,490.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.12 : 12,890.04 = 3,659.24 : x
  2. Step 2: Convert to fraction form
    8,590.12/12,890.04 = 3,659.24/x
  3. Step 3: Cross multiply
    8,590.12x = 12,890.04 × 3,659.24
  4. Step 4: Simplify right side
    8,590.12x = 47,167,749.97
  5. Step 5: Solve for x
    x = 47,167,749.97/8,590.12
  6. Step 6: Final answer
    x = 5,490.93

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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.