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Finding the Fourth Proportional to 7,916.79, 10,924.72 and 4,379.79

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Solution

The fourth proportional to 7,916.79, 10,924.72 and 4,379.79 is: 6,043.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916.79 : 10,924.72 = 4,379.79 : x
  2. Step 2: Convert to fraction form
    7,916.79/10,924.72 = 4,379.79/x
  3. Step 3: Cross multiply
    7,916.79x = 10,924.72 × 4,379.79
  4. Step 4: Simplify right side
    7,916.79x = 47,847,968.46
  5. Step 5: Solve for x
    x = 47,847,968.46/7,916.79
  6. Step 6: Final answer
    x = 6,043.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.