Home / 5,276.85-7,910.36-1,987.74

Finding the Fourth Proportional to 5,276.85, 7,910.36 and 1,987.74

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Solution

The fourth proportional to 5,276.85, 7,910.36 and 1,987.74 is: 2,979.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,276.85 : 7,910.36 = 1,987.74 : x
  2. Step 2: Convert to fraction form
    5,276.85/7,910.36 = 1,987.74/x
  3. Step 3: Cross multiply
    5,276.85x = 7,910.36 × 1,987.74
  4. Step 4: Simplify right side
    5,276.85x = 15,723,736.50
  5. Step 5: Solve for x
    x = 15,723,736.50/5,276.85
  6. Step 6: Final answer
    x = 2,979.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.