Home / 6,987.20-9,642.51-3,800.69

Finding the Fourth Proportional to 6,987.20, 9,642.51 and 3,800.69

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Solution

The fourth proportional to 6,987.20, 9,642.51 and 3,800.69 is: 5,245.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.20 : 9,642.51 = 3,800.69 : x
  2. Step 2: Convert to fraction form
    6,987.20/9,642.51 = 3,800.69/x
  3. Step 3: Cross multiply
    6,987.20x = 9,642.51 × 3,800.69
  4. Step 4: Simplify right side
    6,987.20x = 36,648,179.28
  5. Step 5: Solve for x
    x = 36,648,179.28/6,987.20
  6. Step 6: Final answer
    x = 5,245.05

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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.