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Finding the Fourth Proportional to 20,155.50, 30,037.97 and 19,105.74

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Solution

The fourth proportional to 20,155.50, 30,037.97 and 19,105.74 is: 28,473.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.50 : 30,037.97 = 19,105.74 : x
  2. Step 2: Convert to fraction form
    20,155.50/30,037.97 = 19,105.74/x
  3. Step 3: Cross multiply
    20,155.50x = 30,037.97 × 19,105.74
  4. Step 4: Simplify right side
    20,155.50x = 573,897,692.71
  5. Step 5: Solve for x
    x = 573,897,692.71/20,155.50
  6. Step 6: Final answer
    x = 28,473.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.