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Finding the Fourth Proportional to 3,999.76, 5,510.82 and 2,987.08

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Solution

The fourth proportional to 3,999.76, 5,510.82 and 2,987.08 is: 4,115.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.76 : 5,510.82 = 2,987.08 : x
  2. Step 2: Convert to fraction form
    3,999.76/5,510.82 = 2,987.08/x
  3. Step 3: Cross multiply
    3,999.76x = 5,510.82 × 2,987.08
  4. Step 4: Simplify right side
    3,999.76x = 16,461,260.21
  5. Step 5: Solve for x
    x = 16,461,260.21/3,999.76
  6. Step 6: Final answer
    x = 4,115.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.