Home / 7,941.28-11,916.72-2,750.80

Finding the Fourth Proportional to 7,941.28, 11,916.72 and 2,750.80

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Solution

The fourth proportional to 7,941.28, 11,916.72 and 2,750.80 is: 4,127.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,941.28 : 11,916.72 = 2,750.80 : x
  2. Step 2: Convert to fraction form
    7,941.28/11,916.72 = 2,750.80/x
  3. Step 3: Cross multiply
    7,941.28x = 11,916.72 × 2,750.80
  4. Step 4: Simplify right side
    7,941.28x = 32,780,513.38
  5. Step 5: Solve for x
    x = 32,780,513.38/7,941.28
  6. Step 6: Final answer
    x = 4,127.86

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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.