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Finding the Fourth Proportional to 8,605.80, 12,911.13 and 3,342.42

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Solution

The fourth proportional to 8,605.80, 12,911.13 and 3,342.42 is: 5,014.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.80 : 12,911.13 = 3,342.42 : x
  2. Step 2: Convert to fraction form
    8,605.80/12,911.13 = 3,342.42/x
  3. Step 3: Cross multiply
    8,605.80x = 12,911.13 × 3,342.42
  4. Step 4: Simplify right side
    8,605.80x = 43,154,419.13
  5. Step 5: Solve for x
    x = 43,154,419.13/8,605.80
  6. Step 6: Final answer
    x = 5,014.57

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1.5x scale

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.