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Finding the Fourth Proportional to 9,159.33, 12,640.07 and 5,180.64

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Solution

The fourth proportional to 9,159.33, 12,640.07 and 5,180.64 is: 7,149.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.33 : 12,640.07 = 5,180.64 : x
  2. Step 2: Convert to fraction form
    9,159.33/12,640.07 = 5,180.64/x
  3. Step 3: Cross multiply
    9,159.33x = 12,640.07 × 5,180.64
  4. Step 4: Simplify right side
    9,159.33x = 65,483,626.34
  5. Step 5: Solve for x
    x = 65,483,626.34/9,159.33
  6. Step 6: Final answer
    x = 7,149.39

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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.