Home / 28,209.27-42,320.91-19,905.51

Finding the Fourth Proportional to 28,209.27, 42,320.91 and 19,905.51

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Solution

The fourth proportional to 28,209.27, 42,320.91 and 19,905.51 is: 29,863.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.27 : 42,320.91 = 19,905.51 : x
  2. Step 2: Convert to fraction form
    28,209.27/42,320.91 = 19,905.51/x
  3. Step 3: Cross multiply
    28,209.27x = 42,320.91 × 19,905.51
  4. Step 4: Simplify right side
    28,209.27x = 842,419,297.21
  5. Step 5: Solve for x
    x = 842,419,297.21/28,209.27
  6. Step 6: Final answer
    x = 29,863.21

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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.