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Finding the Fourth Proportional to 7,843.05, 10,812.90 and 6,719.16

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Solution

The fourth proportional to 7,843.05, 10,812.90 and 6,719.16 is: 9,263.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,843.05 : 10,812.90 = 6,719.16 : x
  2. Step 2: Convert to fraction form
    7,843.05/10,812.90 = 6,719.16/x
  3. Step 3: Cross multiply
    7,843.05x = 10,812.90 × 6,719.16
  4. Step 4: Simplify right side
    7,843.05x = 72,653,605.16
  5. Step 5: Solve for x
    x = 72,653,605.16/7,843.05
  6. Step 6: Final answer
    x = 9,263.44

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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.