Home / 2,987.47-4,114.15-2,977.75

Finding the Fourth Proportional to 2,987.47, 4,114.15 and 2,977.75

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Solution

The fourth proportional to 2,987.47, 4,114.15 and 2,977.75 is: 4,100.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.47 : 4,114.15 = 2,977.75 : x
  2. Step 2: Convert to fraction form
    2,987.47/4,114.15 = 2,977.75/x
  3. Step 3: Cross multiply
    2,987.47x = 4,114.15 × 2,977.75
  4. Step 4: Simplify right side
    2,987.47x = 12,250,910.16
  5. Step 5: Solve for x
    x = 12,250,910.16/2,987.47
  6. Step 6: Final answer
    x = 4,100.76

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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.