Home / 12,928.08-19,395-7,081.68

Finding the Fourth Proportional to 12,928.08, 19,395 and 7,081.68

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Solution

The fourth proportional to 12,928.08, 19,395 and 7,081.68 is: 10,624.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.08 : 19,395 = 7,081.68 : x
  2. Step 2: Convert to fraction form
    12,928.08/19,395 = 7,081.68/x
  3. Step 3: Cross multiply
    12,928.08x = 19,395 × 7,081.68
  4. Step 4: Simplify right side
    12,928.08x = 137,349,183.60
  5. Step 5: Solve for x
    x = 137,349,183.60/12,928.08
  6. Step 6: Final answer
    x = 10,624.10

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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.