Home / 20,315.33-30,468.15-8,469.28

Finding the Fourth Proportional to 20,315.33, 30,468.15 and 8,469.28

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Solution

The fourth proportional to 20,315.33, 30,468.15 and 8,469.28 is: 12,701.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.33 : 30,468.15 = 8,469.28 : x
  2. Step 2: Convert to fraction form
    20,315.33/30,468.15 = 8,469.28/x
  3. Step 3: Cross multiply
    20,315.33x = 30,468.15 × 8,469.28
  4. Step 4: Simplify right side
    20,315.33x = 258,043,417.21
  5. Step 5: Solve for x
    x = 258,043,417.21/20,315.33
  6. Step 6: Final answer
    x = 12,701.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.