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Finding the Fourth Proportional to 20,572.60, 30,837.30 and 8,087.80

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Solution

The fourth proportional to 20,572.60, 30,837.30 and 8,087.80 is: 12,123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.60 : 30,837.30 = 8,087.80 : x
  2. Step 2: Convert to fraction form
    20,572.60/30,837.30 = 8,087.80/x
  3. Step 3: Cross multiply
    20,572.60x = 30,837.30 × 8,087.80
  4. Step 4: Simplify right side
    20,572.60x = 249,405,914.94
  5. Step 5: Solve for x
    x = 249,405,914.94/20,572.60
  6. Step 6: Final answer
    x = 12,123.21

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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.