Home / 2,119.68-3,174.08-1,387.12

Finding the Fourth Proportional to 2,119.68, 3,174.08 and 1,387.12

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Solution

The fourth proportional to 2,119.68, 3,174.08 and 1,387.12 is: 2,077.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.68 : 3,174.08 = 1,387.12 : x
  2. Step 2: Convert to fraction form
    2,119.68/3,174.08 = 1,387.12/x
  3. Step 3: Cross multiply
    2,119.68x = 3,174.08 × 1,387.12
  4. Step 4: Simplify right side
    2,119.68x = 4,402,829.85
  5. Step 5: Solve for x
    x = 4,402,829.85/2,119.68
  6. Step 6: Final answer
    x = 2,077.12

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1.5x scale

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.