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Finding the Fourth Proportional to 20,365.25, 30,686.63 and 16,748.49

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Solution

The fourth proportional to 20,365.25, 30,686.63 and 16,748.49 is: 25,236.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.25 : 30,686.63 = 16,748.49 : x
  2. Step 2: Convert to fraction form
    20,365.25/30,686.63 = 16,748.49/x
  3. Step 3: Cross multiply
    20,365.25x = 30,686.63 × 16,748.49
  4. Step 4: Simplify right side
    20,365.25x = 513,954,631.95
  5. Step 5: Solve for x
    x = 513,954,631.95/20,365.25
  6. Step 6: Final answer
    x = 25,236.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.