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Finding the Fourth Proportional to 8,590.11, 12,866.91 and 4,890.43

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Solution

The fourth proportional to 8,590.11, 12,866.91 and 4,890.43 is: 7,325.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.11 : 12,866.91 = 4,890.43 : x
  2. Step 2: Convert to fraction form
    8,590.11/12,866.91 = 4,890.43/x
  3. Step 3: Cross multiply
    8,590.11x = 12,866.91 × 4,890.43
  4. Step 4: Simplify right side
    8,590.11x = 62,924,722.67
  5. Step 5: Solve for x
    x = 62,924,722.67/8,590.11
  6. Step 6: Final answer
    x = 7,325.25

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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.