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Finding the Fourth Proportional to 28,715, 39,625.98 and 15,968.20

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Solution

The fourth proportional to 28,715, 39,625.98 and 15,968.20 is: 22,035.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715 : 39,625.98 = 15,968.20 : x
  2. Step 2: Convert to fraction form
    28,715/39,625.98 = 15,968.20/x
  3. Step 3: Cross multiply
    28,715x = 39,625.98 × 15,968.20
  4. Step 4: Simplify right side
    28,715x = 632,755,573.84
  5. Step 5: Solve for x
    x = 632,755,573.84/28,715
  6. Step 6: Final answer
    x = 22,035.72

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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.