Home / 4,987.68-6,885.90-3,311.40

Finding the Fourth Proportional to 4,987.68, 6,885.90 and 3,311.40

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Solution

The fourth proportional to 4,987.68, 6,885.90 and 3,311.40 is: 4,571.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.68 : 6,885.90 = 3,311.40 : x
  2. Step 2: Convert to fraction form
    4,987.68/6,885.90 = 3,311.40/x
  3. Step 3: Cross multiply
    4,987.68x = 6,885.90 × 3,311.40
  4. Step 4: Simplify right side
    4,987.68x = 22,801,969.26
  5. Step 5: Solve for x
    x = 22,801,969.26/4,987.68
  6. Step 6: Final answer
    x = 4,571.66

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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.