Home / 7,768.20-10,719.99-4,231.50

Finding the Fourth Proportional to 7,768.20, 10,719.99 and 4,231.50

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Solution

The fourth proportional to 7,768.20, 10,719.99 and 4,231.50 is: 5,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.20 : 10,719.99 = 4,231.50 : x
  2. Step 2: Convert to fraction form
    7,768.20/10,719.99 = 4,231.50/x
  3. Step 3: Cross multiply
    7,768.20x = 10,719.99 × 4,231.50
  4. Step 4: Simplify right side
    7,768.20x = 45,361,637.69
  5. Step 5: Solve for x
    x = 45,361,637.69/7,768.20
  6. Step 6: Final answer
    x = 5,839.40

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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.