Home / 10,078.40-15,112.80-3,503.72

Finding the Fourth Proportional to 10,078.40, 15,112.80 and 3,503.72

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Solution

The fourth proportional to 10,078.40, 15,112.80 and 3,503.72 is: 5,253.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,078.40 : 15,112.80 = 3,503.72 : x
  2. Step 2: Convert to fraction form
    10,078.40/15,112.80 = 3,503.72/x
  3. Step 3: Cross multiply
    10,078.40x = 15,112.80 × 3,503.72
  4. Step 4: Simplify right side
    10,078.40x = 52,951,057.40
  5. Step 5: Solve for x
    x = 52,951,057.40/10,078.40
  6. Step 6: Final answer
    x = 5,253.91

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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.