Home / 9,140.73-12,612.96-5,161.20

Finding the Fourth Proportional to 9,140.73, 12,612.96 and 5,161.20

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Solution

The fourth proportional to 9,140.73, 12,612.96 and 5,161.20 is: 7,121.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,140.73 : 12,612.96 = 5,161.20 : x
  2. Step 2: Convert to fraction form
    9,140.73/12,612.96 = 5,161.20/x
  3. Step 3: Cross multiply
    9,140.73x = 12,612.96 × 5,161.20
  4. Step 4: Simplify right side
    9,140.73x = 65,098,009.15
  5. Step 5: Solve for x
    x = 65,098,009.15/9,140.73
  6. Step 6: Final answer
    x = 7,121.75

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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.