Home / 7,815.78-11,723.90-3,071.74

Finding the Fourth Proportional to 7,815.78, 11,723.90 and 3,071.74

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Solution

The fourth proportional to 7,815.78, 11,723.90 and 3,071.74 is: 4,607.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.78 : 11,723.90 = 3,071.74 : x
  2. Step 2: Convert to fraction form
    7,815.78/11,723.90 = 3,071.74/x
  3. Step 3: Cross multiply
    7,815.78x = 11,723.90 × 3,071.74
  4. Step 4: Simplify right side
    7,815.78x = 36,012,772.59
  5. Step 5: Solve for x
    x = 36,012,772.59/7,815.78
  6. Step 6: Final answer
    x = 4,607.70

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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.