Home / 19,132.78-28,708.72-12,811.90

Finding the Fourth Proportional to 19,132.78, 28,708.72 and 12,811.90

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Solution

The fourth proportional to 19,132.78, 28,708.72 and 12,811.90 is: 19,224.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,132.78 : 28,708.72 = 12,811.90 : x
  2. Step 2: Convert to fraction form
    19,132.78/28,708.72 = 12,811.90/x
  3. Step 3: Cross multiply
    19,132.78x = 28,708.72 × 12,811.90
  4. Step 4: Simplify right side
    19,132.78x = 367,813,249.77
  5. Step 5: Solve for x
    x = 367,813,249.77/19,132.78
  6. Step 6: Final answer
    x = 19,224.24

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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.