Home / 28,408.14-39,204.95-15,661.31

Finding the Fourth Proportional to 28,408.14, 39,204.95 and 15,661.31

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Solution

The fourth proportional to 28,408.14, 39,204.95 and 15,661.31 is: 21,613.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.14 : 39,204.95 = 15,661.31 : x
  2. Step 2: Convert to fraction form
    28,408.14/39,204.95 = 15,661.31/x
  3. Step 3: Cross multiply
    28,408.14x = 39,204.95 × 15,661.31
  4. Step 4: Simplify right side
    28,408.14x = 614,000,601.15
  5. Step 5: Solve for x
    x = 614,000,601.15/28,408.14
  6. Step 6: Final answer
    x = 21,613.54

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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.