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Finding the Fourth Proportional to 8,958.55, 13,440.05 and 3,115.21

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Solution

The fourth proportional to 8,958.55, 13,440.05 and 3,115.21 is: 4,673.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.55 : 13,440.05 = 3,115.21 : x
  2. Step 2: Convert to fraction form
    8,958.55/13,440.05 = 3,115.21/x
  3. Step 3: Cross multiply
    8,958.55x = 13,440.05 × 3,115.21
  4. Step 4: Simplify right side
    8,958.55x = 41,868,495.38
  5. Step 5: Solve for x
    x = 41,868,495.38/8,958.55
  6. Step 6: Final answer
    x = 4,673.58

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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.