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Finding the Fourth Proportional to 7,965.78, 10,992 and 4,607.92

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Solution

The fourth proportional to 7,965.78, 10,992 and 4,607.92 is: 6,358.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.78 : 10,992 = 4,607.92 : x
  2. Step 2: Convert to fraction form
    7,965.78/10,992 = 4,607.92/x
  3. Step 3: Cross multiply
    7,965.78x = 10,992 × 4,607.92
  4. Step 4: Simplify right side
    7,965.78x = 50,650,256.64
  5. Step 5: Solve for x
    x = 50,650,256.64/7,965.78
  6. Step 6: Final answer
    x = 6,358.48

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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.