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Finding the Fourth Proportional to 28,696.80, 39,601.04 and 15,949.84

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Solution

The fourth proportional to 28,696.80, 39,601.04 and 15,949.84 is: 22,010.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.80 : 39,601.04 = 15,949.84 : x
  2. Step 2: Convert to fraction form
    28,696.80/39,601.04 = 15,949.84/x
  3. Step 3: Cross multiply
    28,696.80x = 39,601.04 × 15,949.84
  4. Step 4: Simplify right side
    28,696.80x = 631,630,251.83
  5. Step 5: Solve for x
    x = 631,630,251.83/28,696.80
  6. Step 6: Final answer
    x = 22,010.48

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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.