Home / 7,685.79-11,521.39-3,785.64

Finding the Fourth Proportional to 7,685.79, 11,521.39 and 3,785.64

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Solution

The fourth proportional to 7,685.79, 11,521.39 and 3,785.64 is: 5,674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,685.79 : 11,521.39 = 3,785.64 : x
  2. Step 2: Convert to fraction form
    7,685.79/11,521.39 = 3,785.64/x
  3. Step 3: Cross multiply
    7,685.79x = 11,521.39 × 3,785.64
  4. Step 4: Simplify right side
    7,685.79x = 43,615,834.84
  5. Step 5: Solve for x
    x = 43,615,834.84/7,685.79
  6. Step 6: Final answer
    x = 5,674.87

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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.