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Finding the Fourth Proportional to 8,961.11, 13,439.86 and 5,627.87

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Solution

The fourth proportional to 8,961.11, 13,439.86 and 5,627.87 is: 8,440.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.11 : 13,439.86 = 5,627.87 : x
  2. Step 2: Convert to fraction form
    8,961.11/13,439.86 = 5,627.87/x
  3. Step 3: Cross multiply
    8,961.11x = 13,439.86 × 5,627.87
  4. Step 4: Simplify right side
    8,961.11x = 75,637,784.90
  5. Step 5: Solve for x
    x = 75,637,784.90/8,961.11
  6. Step 6: Final answer
    x = 8,440.67

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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.