Home / 10,138.38-15,206.41-2,742.40

Finding the Fourth Proportional to 10,138.38, 15,206.41 and 2,742.40

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Solution

The fourth proportional to 10,138.38, 15,206.41 and 2,742.40 is: 4,113.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,138.38 : 15,206.41 = 2,742.40 : x
  2. Step 2: Convert to fraction form
    10,138.38/15,206.41 = 2,742.40/x
  3. Step 3: Cross multiply
    10,138.38x = 15,206.41 × 2,742.40
  4. Step 4: Simplify right side
    10,138.38x = 41,702,058.78
  5. Step 5: Solve for x
    x = 41,702,058.78/10,138.38
  6. Step 6: Final answer
    x = 4,113.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.