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Finding the Fourth Proportional to 7,913.88, 11,866.88 and 2,916.02

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Solution

The fourth proportional to 7,913.88, 11,866.88 and 2,916.02 is: 4,372.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.88 : 11,866.88 = 2,916.02 : x
  2. Step 2: Convert to fraction form
    7,913.88/11,866.88 = 2,916.02/x
  3. Step 3: Cross multiply
    7,913.88x = 11,866.88 × 2,916.02
  4. Step 4: Simplify right side
    7,913.88x = 34,604,096.37
  5. Step 5: Solve for x
    x = 34,604,096.37/7,913.88
  6. Step 6: Final answer
    x = 4,372.58

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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.