Home / 3,870.13-5,335.78-3,161.23

Finding the Fourth Proportional to 3,870.13, 5,335.78 and 3,161.23

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Solution

The fourth proportional to 3,870.13, 5,335.78 and 3,161.23 is: 4,358.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.13 : 5,335.78 = 3,161.23 : x
  2. Step 2: Convert to fraction form
    3,870.13/5,335.78 = 3,161.23/x
  3. Step 3: Cross multiply
    3,870.13x = 5,335.78 × 3,161.23
  4. Step 4: Simplify right side
    3,870.13x = 16,867,627.81
  5. Step 5: Solve for x
    x = 16,867,627.81/3,870.13
  6. Step 6: Final answer
    x = 4,358.41

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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.