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Finding the Fourth Proportional to 8,615.67, 12,921.12 and 2,374.22

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Solution

The fourth proportional to 8,615.67, 12,921.12 and 2,374.22 is: 3,560.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.67 : 12,921.12 = 2,374.22 : x
  2. Step 2: Convert to fraction form
    8,615.67/12,921.12 = 2,374.22/x
  3. Step 3: Cross multiply
    8,615.67x = 12,921.12 × 2,374.22
  4. Step 4: Simplify right side
    8,615.67x = 30,677,516.92
  5. Step 5: Solve for x
    x = 30,677,516.92/8,615.67
  6. Step 6: Final answer
    x = 3,560.67

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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.