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Finding the Fourth Proportional to 3,618.42, 4,987.92 and 2,831.10

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Solution

The fourth proportional to 3,618.42, 4,987.92 and 2,831.10 is: 3,902.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.42 : 4,987.92 = 2,831.10 : x
  2. Step 2: Convert to fraction form
    3,618.42/4,987.92 = 2,831.10/x
  3. Step 3: Cross multiply
    3,618.42x = 4,987.92 × 2,831.10
  4. Step 4: Simplify right side
    3,618.42x = 14,121,300.31
  5. Step 5: Solve for x
    x = 14,121,300.31/3,618.42
  6. Step 6: Final answer
    x = 3,902.62

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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.