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Finding the Fourth Proportional to 7,963.86, 10,990.75 and 4,777.28

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Solution

The fourth proportional to 7,963.86, 10,990.75 and 4,777.28 is: 6,593.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.86 : 10,990.75 = 4,777.28 : x
  2. Step 2: Convert to fraction form
    7,963.86/10,990.75 = 4,777.28/x
  3. Step 3: Cross multiply
    7,963.86x = 10,990.75 × 4,777.28
  4. Step 4: Simplify right side
    7,963.86x = 52,505,890.16
  5. Step 5: Solve for x
    x = 52,505,890.16/7,963.86
  6. Step 6: Final answer
    x = 6,593.02

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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.