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Finding the Fourth Proportional to 3,992.76, 5,985.36 and 3,126.60

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Solution

The fourth proportional to 3,992.76, 5,985.36 and 3,126.60 is: 4,686.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.76 : 5,985.36 = 3,126.60 : x
  2. Step 2: Convert to fraction form
    3,992.76/5,985.36 = 3,126.60/x
  3. Step 3: Cross multiply
    3,992.76x = 5,985.36 × 3,126.60
  4. Step 4: Simplify right side
    3,992.76x = 18,713,826.58
  5. Step 5: Solve for x
    x = 18,713,826.58/3,992.76
  6. Step 6: Final answer
    x = 4,686.94

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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.