Home / 12,788.28-19,174.74-5,286.06

Finding the Fourth Proportional to 12,788.28, 19,174.74 and 5,286.06

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Solution

The fourth proportional to 12,788.28, 19,174.74 and 5,286.06 is: 7,925.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.28 : 19,174.74 = 5,286.06 : x
  2. Step 2: Convert to fraction form
    12,788.28/19,174.74 = 5,286.06/x
  3. Step 3: Cross multiply
    12,788.28x = 19,174.74 × 5,286.06
  4. Step 4: Simplify right side
    12,788.28x = 101,358,826.12
  5. Step 5: Solve for x
    x = 101,358,826.12/12,788.28
  6. Step 6: Final answer
    x = 7,925.92

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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.