Home / 28,363.89-39,142.16-15,791.61

Finding the Fourth Proportional to 28,363.89, 39,142.16 and 15,791.61

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Solution

The fourth proportional to 28,363.89, 39,142.16 and 15,791.61 is: 21,792.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.89 : 39,142.16 = 15,791.61 : x
  2. Step 2: Convert to fraction form
    28,363.89/39,142.16 = 15,791.61/x
  3. Step 3: Cross multiply
    28,363.89x = 39,142.16 × 15,791.61
  4. Step 4: Simplify right side
    28,363.89x = 618,117,646.32
  5. Step 5: Solve for x
    x = 618,117,646.32/28,363.89
  6. Step 6: Final answer
    x = 21,792.41

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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.