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Finding the Fourth Proportional to 3,992.40, 6,018.48 and 3,724.80

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Solution

The fourth proportional to 3,992.40, 6,018.48 and 3,724.80 is: 5,615.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.40 : 6,018.48 = 3,724.80 : x
  2. Step 2: Convert to fraction form
    3,992.40/6,018.48 = 3,724.80/x
  3. Step 3: Cross multiply
    3,992.40x = 6,018.48 × 3,724.80
  4. Step 4: Simplify right side
    3,992.40x = 22,417,634.30
  5. Step 5: Solve for x
    x = 22,417,634.30/3,992.40
  6. Step 6: Final answer
    x = 5,615.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.