Home / 5,172.39-7,138.40-3,184.11

Finding the Fourth Proportional to 5,172.39, 7,138.40 and 3,184.11

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Solution

The fourth proportional to 5,172.39, 7,138.40 and 3,184.11 is: 4,394.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.39 : 7,138.40 = 3,184.11 : x
  2. Step 2: Convert to fraction form
    5,172.39/7,138.40 = 3,184.11/x
  3. Step 3: Cross multiply
    5,172.39x = 7,138.40 × 3,184.11
  4. Step 4: Simplify right side
    5,172.39x = 22,729,434.90
  5. Step 5: Solve for x
    x = 22,729,434.90/5,172.39
  6. Step 6: Final answer
    x = 4,394.38

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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.