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Finding the Fourth Proportional to 20,144.40, 30,216.60 and 19,123.80

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Solution

The fourth proportional to 20,144.40, 30,216.60 and 19,123.80 is: 28,685.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,144.40 : 30,216.60 = 19,123.80 : x
  2. Step 2: Convert to fraction form
    20,144.40/30,216.60 = 19,123.80/x
  3. Step 3: Cross multiply
    20,144.40x = 30,216.60 × 19,123.80
  4. Step 4: Simplify right side
    20,144.40x = 577,856,215.08
  5. Step 5: Solve for x
    x = 577,856,215.08/20,144.40
  6. Step 6: Final answer
    x = 28,685.70

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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.