Home / 5,172.81-7,138.62-2,934.78

Finding the Fourth Proportional to 5,172.81, 7,138.62 and 2,934.78

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Solution

The fourth proportional to 5,172.81, 7,138.62 and 2,934.78 is: 4,050.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.81 : 7,138.62 = 2,934.78 : x
  2. Step 2: Convert to fraction form
    5,172.81/7,138.62 = 2,934.78/x
  3. Step 3: Cross multiply
    5,172.81x = 7,138.62 × 2,934.78
  4. Step 4: Simplify right side
    5,172.81x = 20,950,279.20
  5. Step 5: Solve for x
    x = 20,950,279.20/5,172.81
  6. Step 6: Final answer
    x = 4,050.08

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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.