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Finding the Fourth Proportional to 10,355.46, 15,520.22 and 8,155.50

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Solution

The fourth proportional to 10,355.46, 15,520.22 and 8,155.50 is: 12,223.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,355.46 : 15,520.22 = 8,155.50 : x
  2. Step 2: Convert to fraction form
    10,355.46/15,520.22 = 8,155.50/x
  3. Step 3: Cross multiply
    10,355.46x = 15,520.22 × 8,155.50
  4. Step 4: Simplify right side
    10,355.46x = 126,575,154.21
  5. Step 5: Solve for x
    x = 126,575,154.21/10,355.46
  6. Step 6: Final answer
    x = 12,223.04

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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.