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Finding the Fourth Proportional to 15,661.70, 21,614.49 and 8,589.48

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Solution

The fourth proportional to 15,661.70, 21,614.49 and 8,589.48 is: 11,854.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.70 : 21,614.49 = 8,589.48 : x
  2. Step 2: Convert to fraction form
    15,661.70/21,614.49 = 8,589.48/x
  3. Step 3: Cross multiply
    15,661.70x = 21,614.49 × 8,589.48
  4. Step 4: Simplify right side
    15,661.70x = 185,657,229.57
  5. Step 5: Solve for x
    x = 185,657,229.57/15,661.70
  6. Step 6: Final answer
    x = 11,854.22

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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.