Home / 12,719.25-19,077.60-7,786.35

Finding the Fourth Proportional to 12,719.25, 19,077.60 and 7,786.35

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Solution

The fourth proportional to 12,719.25, 19,077.60 and 7,786.35 is: 11,678.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,719.25 : 19,077.60 = 7,786.35 : x
  2. Step 2: Convert to fraction form
    12,719.25/19,077.60 = 7,786.35/x
  3. Step 3: Cross multiply
    12,719.25x = 19,077.60 × 7,786.35
  4. Step 4: Simplify right side
    12,719.25x = 148,544,870.76
  5. Step 5: Solve for x
    x = 148,544,870.76/12,719.25
  6. Step 6: Final answer
    x = 11,678.74

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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.