Home / 28,408.16-39,203.53-15,661.79

Finding the Fourth Proportional to 28,408.16, 39,203.53 and 15,661.79

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Solution

The fourth proportional to 28,408.16, 39,203.53 and 15,661.79 is: 21,613.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.16 : 39,203.53 = 15,661.79 : x
  2. Step 2: Convert to fraction form
    28,408.16/39,203.53 = 15,661.79/x
  3. Step 3: Cross multiply
    28,408.16x = 39,203.53 × 15,661.79
  4. Step 4: Simplify right side
    28,408.16x = 613,997,365.96
  5. Step 5: Solve for x
    x = 613,997,365.96/28,408.16
  6. Step 6: Final answer
    x = 21,613.42

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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.