Home / 7,911.40-11,868.38-3,528.76

Finding the Fourth Proportional to 7,911.40, 11,868.38 and 3,528.76

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Solution

The fourth proportional to 7,911.40, 11,868.38 and 3,528.76 is: 5,293.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.40 : 11,868.38 = 3,528.76 : x
  2. Step 2: Convert to fraction form
    7,911.40/11,868.38 = 3,528.76/x
  3. Step 3: Cross multiply
    7,911.40x = 11,868.38 × 3,528.76
  4. Step 4: Simplify right side
    7,911.40x = 41,880,664.61
  5. Step 5: Solve for x
    x = 41,880,664.61/7,911.40
  6. Step 6: Final answer
    x = 5,293.71

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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.