Home / 19,840.68-27,380.43-12,769.38

Finding the Fourth Proportional to 19,840.68, 27,380.43 and 12,769.38

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Solution

The fourth proportional to 19,840.68, 27,380.43 and 12,769.38 is: 17,621.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,840.68 : 27,380.43 = 12,769.38 : x
  2. Step 2: Convert to fraction form
    19,840.68/27,380.43 = 12,769.38/x
  3. Step 3: Cross multiply
    19,840.68x = 27,380.43 × 12,769.38
  4. Step 4: Simplify right side
    19,840.68x = 349,631,115.23
  5. Step 5: Solve for x
    x = 349,631,115.23/19,840.68
  6. Step 6: Final answer
    x = 17,621.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.