Home / 10,124.28-15,186.78-3,198.78

Finding the Fourth Proportional to 10,124.28, 15,186.78 and 3,198.78

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Solution

The fourth proportional to 10,124.28, 15,186.78 and 3,198.78 is: 4,798.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,124.28 : 15,186.78 = 3,198.78 : x
  2. Step 2: Convert to fraction form
    10,124.28/15,186.78 = 3,198.78/x
  3. Step 3: Cross multiply
    10,124.28x = 15,186.78 × 3,198.78
  4. Step 4: Simplify right side
    10,124.28x = 48,579,168.13
  5. Step 5: Solve for x
    x = 48,579,168.13/10,124.28
  6. Step 6: Final answer
    x = 4,798.28

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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.