Home / 12,736.80-19,109.64-5,721.78

Finding the Fourth Proportional to 12,736.80, 19,109.64 and 5,721.78

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Solution

The fourth proportional to 12,736.80, 19,109.64 and 5,721.78 is: 8,584.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,736.80 : 19,109.64 = 5,721.78 : x
  2. Step 2: Convert to fraction form
    12,736.80/19,109.64 = 5,721.78/x
  3. Step 3: Cross multiply
    12,736.80x = 19,109.64 × 5,721.78
  4. Step 4: Simplify right side
    12,736.80x = 109,341,155.96
  5. Step 5: Solve for x
    x = 109,341,155.96/12,736.80
  6. Step 6: Final answer
    x = 8,584.66

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1.5x scale

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.