Home / 5,174.61-7,140.78-2,816.70

Finding the Fourth Proportional to 5,174.61, 7,140.78 and 2,816.70

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Solution

The fourth proportional to 5,174.61, 7,140.78 and 2,816.70 is: 3,886.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,174.61 : 7,140.78 = 2,816.70 : x
  2. Step 2: Convert to fraction form
    5,174.61/7,140.78 = 2,816.70/x
  3. Step 3: Cross multiply
    5,174.61x = 7,140.78 × 2,816.70
  4. Step 4: Simplify right side
    5,174.61x = 20,113,435.03
  5. Step 5: Solve for x
    x = 20,113,435.03/5,174.61
  6. Step 6: Final answer
    x = 3,886.95

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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.