Home / 2,115.15-3,173.61-1,140.11

Finding the Fourth Proportional to 2,115.15, 3,173.61 and 1,140.11

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Solution

The fourth proportional to 2,115.15, 3,173.61 and 1,140.11 is: 1,710.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.15 : 3,173.61 = 1,140.11 : x
  2. Step 2: Convert to fraction form
    2,115.15/3,173.61 = 1,140.11/x
  3. Step 3: Cross multiply
    2,115.15x = 3,173.61 × 1,140.11
  4. Step 4: Simplify right side
    2,115.15x = 3,618,264.81
  5. Step 5: Solve for x
    x = 3,618,264.81/2,115.15
  6. Step 6: Final answer
    x = 1,710.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.