Home / 12,936.80-19,372.80-8,530.40

Finding the Fourth Proportional to 12,936.80, 19,372.80 and 8,530.40

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Solution

The fourth proportional to 12,936.80, 19,372.80 and 8,530.40 is: 12,774.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.80 : 19,372.80 = 8,530.40 : x
  2. Step 2: Convert to fraction form
    12,936.80/19,372.80 = 8,530.40/x
  3. Step 3: Cross multiply
    12,936.80x = 19,372.80 × 8,530.40
  4. Step 4: Simplify right side
    12,936.80x = 165,257,733.12
  5. Step 5: Solve for x
    x = 165,257,733.12/12,936.80
  6. Step 6: Final answer
    x = 12,774.24

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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.