Home / 7,738.79-11,612.80-2,808.81

Finding the Fourth Proportional to 7,738.79, 11,612.80 and 2,808.81

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Solution

The fourth proportional to 7,738.79, 11,612.80 and 2,808.81 is: 4,214.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,738.79 : 11,612.80 = 2,808.81 : x
  2. Step 2: Convert to fraction form
    7,738.79/11,612.80 = 2,808.81/x
  3. Step 3: Cross multiply
    7,738.79x = 11,612.80 × 2,808.81
  4. Step 4: Simplify right side
    7,738.79x = 32,618,163.76
  5. Step 5: Solve for x
    x = 32,618,163.76/7,738.79
  6. Step 6: Final answer
    x = 4,214.89

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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.