Home / 5,155.95-7,115.65-3,167.20

Finding the Fourth Proportional to 5,155.95, 7,115.65 and 3,167.20

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Solution

The fourth proportional to 5,155.95, 7,115.65 and 3,167.20 is: 4,371.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.95 : 7,115.65 = 3,167.20 : x
  2. Step 2: Convert to fraction form
    5,155.95/7,115.65 = 3,167.20/x
  3. Step 3: Cross multiply
    5,155.95x = 7,115.65 × 3,167.20
  4. Step 4: Simplify right side
    5,155.95x = 22,536,687.66
  5. Step 5: Solve for x
    x = 22,536,687.66/5,155.95
  6. Step 6: Final answer
    x = 4,371.00

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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.