Home / 28,411.54-39,207.20-15,664.43

Finding the Fourth Proportional to 28,411.54, 39,207.20 and 15,664.43

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Solution

The fourth proportional to 28,411.54, 39,207.20 and 15,664.43 is: 21,616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.54 : 39,207.20 = 15,664.43 : x
  2. Step 2: Convert to fraction form
    28,411.54/39,207.20 = 15,664.43/x
  3. Step 3: Cross multiply
    28,411.54x = 39,207.20 × 15,664.43
  4. Step 4: Simplify right side
    28,411.54x = 614,158,439.90
  5. Step 5: Solve for x
    x = 614,158,439.90/28,411.54
  6. Step 6: Final answer
    x = 21,616.51

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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.