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Finding the Fourth Proportional to 8,805.65, 13,208.48 and 2,142.15

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Solution

The fourth proportional to 8,805.65, 13,208.48 and 2,142.15 is: 3,213.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.65 : 13,208.48 = 2,142.15 : x
  2. Step 2: Convert to fraction form
    8,805.65/13,208.48 = 2,142.15/x
  3. Step 3: Cross multiply
    8,805.65x = 13,208.48 × 2,142.15
  4. Step 4: Simplify right side
    8,805.65x = 28,294,545.43
  5. Step 5: Solve for x
    x = 28,294,545.43/8,805.65
  6. Step 6: Final answer
    x = 3,213.23

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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.