Home / 15,520.92-21,418.20-8,447.40

Finding the Fourth Proportional to 15,520.92, 21,418.20 and 8,447.40

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Solution

The fourth proportional to 15,520.92, 21,418.20 and 8,447.40 is: 11,657.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.92 : 21,418.20 = 8,447.40 : x
  2. Step 2: Convert to fraction form
    15,520.92/21,418.20 = 8,447.40/x
  3. Step 3: Cross multiply
    15,520.92x = 21,418.20 × 8,447.40
  4. Step 4: Simplify right side
    15,520.92x = 180,928,102.68
  5. Step 5: Solve for x
    x = 180,928,102.68/15,520.92
  6. Step 6: Final answer
    x = 11,657.05

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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.