Home / 13,251.12-19,876.68-3,390.42

Finding the Fourth Proportional to 13,251.12, 19,876.68 and 3,390.42

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Solution

The fourth proportional to 13,251.12, 19,876.68 and 3,390.42 is: 5,085.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.12 : 19,876.68 = 3,390.42 : x
  2. Step 2: Convert to fraction form
    13,251.12/19,876.68 = 3,390.42/x
  3. Step 3: Cross multiply
    13,251.12x = 19,876.68 × 3,390.42
  4. Step 4: Simplify right side
    13,251.12x = 67,390,293.41
  5. Step 5: Solve for x
    x = 67,390,293.41/13,251.12
  6. Step 6: Final answer
    x = 5,085.63

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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.