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Finding the Fourth Proportional to 6,645.87, 9,175.68 and 5,130.69

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Solution

The fourth proportional to 6,645.87, 9,175.68 and 5,130.69 is: 7,083.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.87 : 9,175.68 = 5,130.69 : x
  2. Step 2: Convert to fraction form
    6,645.87/9,175.68 = 5,130.69/x
  3. Step 3: Cross multiply
    6,645.87x = 9,175.68 × 5,130.69
  4. Step 4: Simplify right side
    6,645.87x = 47,077,569.62
  5. Step 5: Solve for x
    x = 47,077,569.62/6,645.87
  6. Step 6: Final answer
    x = 7,083.73

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Double scale
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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.