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Finding the Fourth Proportional to 8,699.43, 12,013.19 and 5,561.09

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Solution

The fourth proportional to 8,699.43, 12,013.19 and 5,561.09 is: 7,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.43 : 12,013.19 = 5,561.09 : x
  2. Step 2: Convert to fraction form
    8,699.43/12,013.19 = 5,561.09/x
  3. Step 3: Cross multiply
    8,699.43x = 12,013.19 × 5,561.09
  4. Step 4: Simplify right side
    8,699.43x = 66,806,342.91
  5. Step 5: Solve for x
    x = 66,806,342.91/8,699.43
  6. Step 6: Final answer
    x = 7,679.39

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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.