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Finding the Fourth Proportional to 7,791.45, 10,724.13 and 6,518.52

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Solution

The fourth proportional to 7,791.45, 10,724.13 and 6,518.52 is: 8,972.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.45 : 10,724.13 = 6,518.52 : x
  2. Step 2: Convert to fraction form
    7,791.45/10,724.13 = 6,518.52/x
  3. Step 3: Cross multiply
    7,791.45x = 10,724.13 × 6,518.52
  4. Step 4: Simplify right side
    7,791.45x = 69,905,455.89
  5. Step 5: Solve for x
    x = 69,905,455.89/7,791.45
  6. Step 6: Final answer
    x = 8,972.07

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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.