Home / 15,531.05-21,433.10-8,816.87

Finding the Fourth Proportional to 15,531.05, 21,433.10 and 8,816.87

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Solution

The fourth proportional to 15,531.05, 21,433.10 and 8,816.87 is: 12,167.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.05 : 21,433.10 = 8,816.87 : x
  2. Step 2: Convert to fraction form
    15,531.05/21,433.10 = 8,816.87/x
  3. Step 3: Cross multiply
    15,531.05x = 21,433.10 × 8,816.87
  4. Step 4: Simplify right side
    15,531.05x = 188,972,834.35
  5. Step 5: Solve for x
    x = 188,972,834.35/15,531.05
  6. Step 6: Final answer
    x = 12,167.43

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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.