Home / 5,126.39-7,078.21-3,139.66

Finding the Fourth Proportional to 5,126.39, 7,078.21 and 3,139.66

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Solution

The fourth proportional to 5,126.39, 7,078.21 and 3,139.66 is: 4,335.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.39 : 7,078.21 = 3,139.66 : x
  2. Step 2: Convert to fraction form
    5,126.39/7,078.21 = 3,139.66/x
  3. Step 3: Cross multiply
    5,126.39x = 7,078.21 × 3,139.66
  4. Step 4: Simplify right side
    5,126.39x = 22,223,172.81
  5. Step 5: Solve for x
    x = 22,223,172.81/5,126.39
  6. Step 6: Final answer
    x = 4,335.05

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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.