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Finding the Fourth Proportional to 3,987.88, 5,973.66 and 3,871.24

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Solution

The fourth proportional to 3,987.88, 5,973.66 and 3,871.24 is: 5,798.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.88 : 5,973.66 = 3,871.24 : x
  2. Step 2: Convert to fraction form
    3,987.88/5,973.66 = 3,871.24/x
  3. Step 3: Cross multiply
    3,987.88x = 5,973.66 × 3,871.24
  4. Step 4: Simplify right side
    3,987.88x = 23,125,471.54
  5. Step 5: Solve for x
    x = 23,125,471.54/3,987.88
  6. Step 6: Final answer
    x = 5,798.94

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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.