Home / 19,728.42-29,606.78-13,387.48

Finding the Fourth Proportional to 19,728.42, 29,606.78 and 13,387.48

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Solution

The fourth proportional to 19,728.42, 29,606.78 and 13,387.48 is: 20,090.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728.42 : 29,606.78 = 13,387.48 : x
  2. Step 2: Convert to fraction form
    19,728.42/29,606.78 = 13,387.48/x
  3. Step 3: Cross multiply
    19,728.42x = 29,606.78 × 13,387.48
  4. Step 4: Simplify right side
    19,728.42x = 396,360,301.10
  5. Step 5: Solve for x
    x = 396,360,301.10/19,728.42
  6. Step 6: Final answer
    x = 20,090.83

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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.