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Finding the Fourth Proportional to 3,889.80, 5,840.16 and 3,713.46

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Solution

The fourth proportional to 3,889.80, 5,840.16 and 3,713.46 is: 5,575.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.80 : 5,840.16 = 3,713.46 : x
  2. Step 2: Convert to fraction form
    3,889.80/5,840.16 = 3,713.46/x
  3. Step 3: Cross multiply
    3,889.80x = 5,840.16 × 3,713.46
  4. Step 4: Simplify right side
    3,889.80x = 21,687,200.55
  5. Step 5: Solve for x
    x = 21,687,200.55/3,889.80
  6. Step 6: Final answer
    x = 5,575.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.