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Finding the Fourth Proportional to 28,792.27, 39,718.15 and 19,824.20

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Solution

The fourth proportional to 28,792.27, 39,718.15 and 19,824.20 is: 27,346.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,792.27 : 39,718.15 = 19,824.20 : x
  2. Step 2: Convert to fraction form
    28,792.27/39,718.15 = 19,824.20/x
  3. Step 3: Cross multiply
    28,792.27x = 39,718.15 × 19,824.20
  4. Step 4: Simplify right side
    28,792.27x = 787,380,784.95
  5. Step 5: Solve for x
    x = 787,380,784.95/28,792.27
  6. Step 6: Final answer
    x = 27,346.95

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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.