Home / 28,421.22-39,223.62-15,676.90

Finding the Fourth Proportional to 28,421.22, 39,223.62 and 15,676.90

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Solution

The fourth proportional to 28,421.22, 39,223.62 and 15,676.90 is: 21,635.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.22 : 39,223.62 = 15,676.90 : x
  2. Step 2: Convert to fraction form
    28,421.22/39,223.62 = 15,676.90/x
  3. Step 3: Cross multiply
    28,421.22x = 39,223.62 × 15,676.90
  4. Step 4: Simplify right side
    28,421.22x = 614,904,768.38
  5. Step 5: Solve for x
    x = 614,904,768.38/28,421.22
  6. Step 6: Final answer
    x = 21,635.41

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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.