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Finding the Fourth Proportional to 9,132.78, 13,699.53 and 2,976.78

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Solution

The fourth proportional to 9,132.78, 13,699.53 and 2,976.78 is: 4,465.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,132.78 : 13,699.53 = 2,976.78 : x
  2. Step 2: Convert to fraction form
    9,132.78/13,699.53 = 2,976.78/x
  3. Step 3: Cross multiply
    9,132.78x = 13,699.53 × 2,976.78
  4. Step 4: Simplify right side
    9,132.78x = 40,780,486.91
  5. Step 5: Solve for x
    x = 40,780,486.91/9,132.78
  6. Step 6: Final answer
    x = 4,465.29

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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.