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Finding the Fourth Proportional to 8,590.79, 12,877.97 and 5,461.11

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Solution

The fourth proportional to 8,590.79, 12,877.97 and 5,461.11 is: 8,186.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.79 : 12,877.97 = 5,461.11 : x
  2. Step 2: Convert to fraction form
    8,590.79/12,877.97 = 5,461.11/x
  3. Step 3: Cross multiply
    8,590.79x = 12,877.97 × 5,461.11
  4. Step 4: Simplify right side
    8,590.79x = 70,327,983.44
  5. Step 5: Solve for x
    x = 70,327,983.44/8,590.79
  6. Step 6: Final answer
    x = 8,186.44

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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.