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Finding the Fourth Proportional to 28,661.94, 39,552.95 and 15,915.17

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Solution

The fourth proportional to 28,661.94, 39,552.95 and 15,915.17 is: 21,962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.94 : 39,552.95 = 15,915.17 : x
  2. Step 2: Convert to fraction form
    28,661.94/39,552.95 = 15,915.17/x
  3. Step 3: Cross multiply
    28,661.94x = 39,552.95 × 15,915.17
  4. Step 4: Simplify right side
    28,661.94x = 629,491,645.91
  5. Step 5: Solve for x
    x = 629,491,645.91/28,661.94
  6. Step 6: Final answer
    x = 21,962.63

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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.