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Finding the Fourth Proportional to 8,958.57, 13,437.80 and 3,115.13

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Solution

The fourth proportional to 8,958.57, 13,437.80 and 3,115.13 is: 4,672.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.57 : 13,437.80 = 3,115.13 : x
  2. Step 2: Convert to fraction form
    8,958.57/13,437.80 = 3,115.13/x
  3. Step 3: Cross multiply
    8,958.57x = 13,437.80 × 3,115.13
  4. Step 4: Simplify right side
    8,958.57x = 41,860,422.83
  5. Step 5: Solve for x
    x = 41,860,422.83/8,958.57
  6. Step 6: Final answer
    x = 4,672.67

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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.