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Finding the Fourth Proportional to 5,750.78, 7,938.54 and 3,960.77

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Solution

The fourth proportional to 5,750.78, 7,938.54 and 3,960.77 is: 5,467.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,750.78 : 7,938.54 = 3,960.77 : x
  2. Step 2: Convert to fraction form
    5,750.78/7,938.54 = 3,960.77/x
  3. Step 3: Cross multiply
    5,750.78x = 7,938.54 × 3,960.77
  4. Step 4: Simplify right side
    5,750.78x = 31,442,731.08
  5. Step 5: Solve for x
    x = 31,442,731.08/5,750.78
  6. Step 6: Final answer
    x = 5,467.56

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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.