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Finding the Fourth Proportional to 8,789.63, 12,129.68 and 6,553.42

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Solution

The fourth proportional to 8,789.63, 12,129.68 and 6,553.42 is: 9,043.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.63 : 12,129.68 = 6,553.42 : x
  2. Step 2: Convert to fraction form
    8,789.63/12,129.68 = 6,553.42/x
  3. Step 3: Cross multiply
    8,789.63x = 12,129.68 × 6,553.42
  4. Step 4: Simplify right side
    8,789.63x = 79,490,873.56
  5. Step 5: Solve for x
    x = 79,490,873.56/8,789.63
  6. Step 6: Final answer
    x = 9,043.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.