Home / 10,491.20-15,736.80-4,942.70

Finding the Fourth Proportional to 10,491.20, 15,736.80 and 4,942.70

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Solution

The fourth proportional to 10,491.20, 15,736.80 and 4,942.70 is: 7,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,491.20 : 15,736.80 = 4,942.70 : x
  2. Step 2: Convert to fraction form
    10,491.20/15,736.80 = 4,942.70/x
  3. Step 3: Cross multiply
    10,491.20x = 15,736.80 × 4,942.70
  4. Step 4: Simplify right side
    10,491.20x = 77,782,281.36
  5. Step 5: Solve for x
    x = 77,782,281.36/10,491.20
  6. Step 6: Final answer
    x = 7,414.05

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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.