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Finding the Fourth Proportional to 20,597.87, 30,909.36 and 18,924.95

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Solution

The fourth proportional to 20,597.87, 30,909.36 and 18,924.95 is: 28,398.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,597.87 : 30,909.36 = 18,924.95 : x
  2. Step 2: Convert to fraction form
    20,597.87/30,909.36 = 18,924.95/x
  3. Step 3: Cross multiply
    20,597.87x = 30,909.36 × 18,924.95
  4. Step 4: Simplify right side
    20,597.87x = 584,958,092.53
  5. Step 5: Solve for x
    x = 584,958,092.53/20,597.87
  6. Step 6: Final answer
    x = 28,398.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.