Home / 9,161.62-12,641.40-5,385.56

Finding the Fourth Proportional to 9,161.62, 12,641.40 and 5,385.56

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Solution

The fourth proportional to 9,161.62, 12,641.40 and 5,385.56 is: 7,431.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,161.62 : 12,641.40 = 5,385.56 : x
  2. Step 2: Convert to fraction form
    9,161.62/12,641.40 = 5,385.56/x
  3. Step 3: Cross multiply
    9,161.62x = 12,641.40 × 5,385.56
  4. Step 4: Simplify right side
    9,161.62x = 68,080,954.98
  5. Step 5: Solve for x
    x = 68,080,954.98/9,161.62
  6. Step 6: Final answer
    x = 7,431.11

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Double scale
Find fourth proportional to 9,162.62, 12,642.78 and 5,386.56
Similar ratio
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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.