Home / 3,138.30-4,328.51-2,142

Finding the Fourth Proportional to 3,138.30, 4,328.51 and 2,142

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Solution

The fourth proportional to 3,138.30, 4,328.51 and 2,142 is: 2,954.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.30 : 4,328.51 = 2,142 : x
  2. Step 2: Convert to fraction form
    3,138.30/4,328.51 = 2,142/x
  3. Step 3: Cross multiply
    3,138.30x = 4,328.51 × 2,142
  4. Step 4: Simplify right side
    3,138.30x = 9,271,657.71
  5. Step 5: Solve for x
    x = 9,271,657.71/3,138.30
  6. Step 6: Final answer
    x = 2,954.36

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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.