Home / 13,250.78-19,876.10-3,390.06

Finding the Fourth Proportional to 13,250.78, 19,876.10 and 3,390.06

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Solution

The fourth proportional to 13,250.78, 19,876.10 and 3,390.06 is: 5,085.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,250.78 : 19,876.10 = 3,390.06 : x
  2. Step 2: Convert to fraction form
    13,250.78/19,876.10 = 3,390.06/x
  3. Step 3: Cross multiply
    13,250.78x = 19,876.10 × 3,390.06
  4. Step 4: Simplify right side
    13,250.78x = 67,381,171.57
  5. Step 5: Solve for x
    x = 67,381,171.57/13,250.78
  6. Step 6: Final answer
    x = 5,085.07

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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.