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Finding the Fourth Proportional to 7,661.78, 10,574.40 and 4,679.33

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Solution

The fourth proportional to 7,661.78, 10,574.40 and 4,679.33 is: 6,458.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,661.78 : 10,574.40 = 4,679.33 : x
  2. Step 2: Convert to fraction form
    7,661.78/10,574.40 = 4,679.33/x
  3. Step 3: Cross multiply
    7,661.78x = 10,574.40 × 4,679.33
  4. Step 4: Simplify right side
    7,661.78x = 49,481,107.15
  5. Step 5: Solve for x
    x = 49,481,107.15/7,661.78
  6. Step 6: Final answer
    x = 6,458.17

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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.