Home / 28,408.19-39,203.58-15,661.88

Finding the Fourth Proportional to 28,408.19, 39,203.58 and 15,661.88

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Solution

The fourth proportional to 28,408.19, 39,203.58 and 15,661.88 is: 21,613.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.19 : 39,203.58 = 15,661.88 : x
  2. Step 2: Convert to fraction form
    28,408.19/39,203.58 = 15,661.88/x
  3. Step 3: Cross multiply
    28,408.19x = 39,203.58 × 15,661.88
  4. Step 4: Simplify right side
    28,408.19x = 614,001,765.53
  5. Step 5: Solve for x
    x = 614,001,765.53/28,408.19
  6. Step 6: Final answer
    x = 21,613.55

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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.