Home / 28,564.20-39,418.62-15,643.41

Finding the Fourth Proportional to 28,564.20, 39,418.62 and 15,643.41

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Solution

The fourth proportional to 28,564.20, 39,418.62 and 15,643.41 is: 21,587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,564.20 : 39,418.62 = 15,643.41 : x
  2. Step 2: Convert to fraction form
    28,564.20/39,418.62 = 15,643.41/x
  3. Step 3: Cross multiply
    28,564.20x = 39,418.62 × 15,643.41
  4. Step 4: Simplify right side
    28,564.20x = 616,641,649.54
  5. Step 5: Solve for x
    x = 616,641,649.54/28,564.20
  6. Step 6: Final answer
    x = 21,587.92

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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.