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Finding the Fourth Proportional to 8,608.10, 11,874.18 and 5,420.15

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Solution

The fourth proportional to 8,608.10, 11,874.18 and 5,420.15 is: 7,476.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.10 : 11,874.18 = 5,420.15 : x
  2. Step 2: Convert to fraction form
    8,608.10/11,874.18 = 5,420.15/x
  3. Step 3: Cross multiply
    8,608.10x = 11,874.18 × 5,420.15
  4. Step 4: Simplify right side
    8,608.10x = 64,359,750.26
  5. Step 5: Solve for x
    x = 64,359,750.26/8,608.10
  6. Step 6: Final answer
    x = 7,476.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.