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Finding the Fourth Proportional to 3,891.42, 5,807.88 and 3,560.94

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Solution

The fourth proportional to 3,891.42, 5,807.88 and 3,560.94 is: 5,314.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.42 : 5,807.88 = 3,560.94 : x
  2. Step 2: Convert to fraction form
    3,891.42/5,807.88 = 3,560.94/x
  3. Step 3: Cross multiply
    3,891.42x = 5,807.88 × 3,560.94
  4. Step 4: Simplify right side
    3,891.42x = 20,681,512.21
  5. Step 5: Solve for x
    x = 20,681,512.21/3,891.42
  6. Step 6: Final answer
    x = 5,314.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.