Home / 28,408.64-39,205.66-15,661.82

Finding the Fourth Proportional to 28,408.64, 39,205.66 and 15,661.82

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Solution

The fourth proportional to 28,408.64, 39,205.66 and 15,661.82 is: 21,614.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.64 : 39,205.66 = 15,661.82 : x
  2. Step 2: Convert to fraction form
    28,408.64/39,205.66 = 15,661.82/x
  3. Step 3: Cross multiply
    28,408.64x = 39,205.66 × 15,661.82
  4. Step 4: Simplify right side
    28,408.64x = 614,031,989.90
  5. Step 5: Solve for x
    x = 614,031,989.90/28,408.64
  6. Step 6: Final answer
    x = 21,614.27

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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.