Home / 13,251.15-19,876.51-3,390.34

Finding the Fourth Proportional to 13,251.15, 19,876.51 and 3,390.34

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Solution

The fourth proportional to 13,251.15, 19,876.51 and 3,390.34 is: 5,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.15 : 19,876.51 = 3,390.34 : x
  2. Step 2: Convert to fraction form
    13,251.15/19,876.51 = 3,390.34/x
  3. Step 3: Cross multiply
    13,251.15x = 19,876.51 × 3,390.34
  4. Step 4: Simplify right side
    13,251.15x = 67,388,126.91
  5. Step 5: Solve for x
    x = 67,388,126.91/13,251.15
  6. Step 6: Final answer
    x = 5,085.45

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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.