Home / 7,821.64-11,723.58-3,656.68

Finding the Fourth Proportional to 7,821.64, 11,723.58 and 3,656.68

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Solution

The fourth proportional to 7,821.64, 11,723.58 and 3,656.68 is: 5,480.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.64 : 11,723.58 = 3,656.68 : x
  2. Step 2: Convert to fraction form
    7,821.64/11,723.58 = 3,656.68/x
  3. Step 3: Cross multiply
    7,821.64x = 11,723.58 × 3,656.68
  4. Step 4: Simplify right side
    7,821.64x = 42,869,380.51
  5. Step 5: Solve for x
    x = 42,869,380.51/7,821.64
  6. Step 6: Final answer
    x = 5,480.87

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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.