Home / 3,107.63-4,287.93-1,987.71

Finding the Fourth Proportional to 3,107.63, 4,287.93 and 1,987.71

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Solution

The fourth proportional to 3,107.63, 4,287.93 and 1,987.71 is: 2,742.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.63 : 4,287.93 = 1,987.71 : x
  2. Step 2: Convert to fraction form
    3,107.63/4,287.93 = 1,987.71/x
  3. Step 3: Cross multiply
    3,107.63x = 4,287.93 × 1,987.71
  4. Step 4: Simplify right side
    3,107.63x = 8,523,161.34
  5. Step 5: Solve for x
    x = 8,523,161.34/3,107.63
  6. Step 6: Final answer
    x = 2,742.66

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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.