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Finding the Fourth Proportional to 8,749.12, 13,109.04 and 6,912.16

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Solution

The fourth proportional to 8,749.12, 13,109.04 and 6,912.16 is: 10,356.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,749.12 : 13,109.04 = 6,912.16 : x
  2. Step 2: Convert to fraction form
    8,749.12/13,109.04 = 6,912.16/x
  3. Step 3: Cross multiply
    8,749.12x = 13,109.04 × 6,912.16
  4. Step 4: Simplify right side
    8,749.12x = 90,611,781.93
  5. Step 5: Solve for x
    x = 90,611,781.93/8,749.12
  6. Step 6: Final answer
    x = 10,356.67

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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.