Home / 15,520.82-21,418.70-8,447.22

Finding the Fourth Proportional to 15,520.82, 21,418.70 and 8,447.22

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Solution

The fourth proportional to 15,520.82, 21,418.70 and 8,447.22 is: 11,657.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.82 : 21,418.70 = 8,447.22 : x
  2. Step 2: Convert to fraction form
    15,520.82/21,418.70 = 8,447.22/x
  3. Step 3: Cross multiply
    15,520.82x = 21,418.70 × 8,447.22
  4. Step 4: Simplify right side
    15,520.82x = 180,928,428.78
  5. Step 5: Solve for x
    x = 180,928,428.78/15,520.82
  6. Step 6: Final answer
    x = 11,657.15

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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.