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Finding the Fourth Proportional to 7,915.78, 10,923.87 and 4,379.14

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Solution

The fourth proportional to 7,915.78, 10,923.87 and 4,379.14 is: 6,043.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.78 : 10,923.87 = 4,379.14 : x
  2. Step 2: Convert to fraction form
    7,915.78/10,923.87 = 4,379.14/x
  3. Step 3: Cross multiply
    7,915.78x = 10,923.87 × 4,379.14
  4. Step 4: Simplify right side
    7,915.78x = 47,837,156.07
  5. Step 5: Solve for x
    x = 47,837,156.07/7,915.78
  6. Step 6: Final answer
    x = 6,043.26

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1.5x scale

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.