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Finding the Fourth Proportional to 5,705.80, 7,884.07 and 4,390.87

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Solution

The fourth proportional to 5,705.80, 7,884.07 and 4,390.87 is: 6,067.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,705.80 : 7,884.07 = 4,390.87 : x
  2. Step 2: Convert to fraction form
    5,705.80/7,884.07 = 4,390.87/x
  3. Step 3: Cross multiply
    5,705.80x = 7,884.07 × 4,390.87
  4. Step 4: Simplify right side
    5,705.80x = 34,617,923.70
  5. Step 5: Solve for x
    x = 34,617,923.70/5,705.80
  6. Step 6: Final answer
    x = 6,067.14

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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.