Home / 2,987.43-4,116.85-2,939.64

Finding the Fourth Proportional to 2,987.43, 4,116.85 and 2,939.64

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Solution

The fourth proportional to 2,987.43, 4,116.85 and 2,939.64 is: 4,050.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.43 : 4,116.85 = 2,939.64 : x
  2. Step 2: Convert to fraction form
    2,987.43/4,116.85 = 2,939.64/x
  3. Step 3: Cross multiply
    2,987.43x = 4,116.85 × 2,939.64
  4. Step 4: Simplify right side
    2,987.43x = 12,102,056.93
  5. Step 5: Solve for x
    x = 12,102,056.93/2,987.43
  6. Step 6: Final answer
    x = 4,050.99

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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.