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Finding the Fourth Proportional to 20,404.40, 30,606.60 and 18,436.10

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Solution

The fourth proportional to 20,404.40, 30,606.60 and 18,436.10 is: 27,654.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.40 : 30,606.60 = 18,436.10 : x
  2. Step 2: Convert to fraction form
    20,404.40/30,606.60 = 18,436.10/x
  3. Step 3: Cross multiply
    20,404.40x = 30,606.60 × 18,436.10
  4. Step 4: Simplify right side
    20,404.40x = 564,266,338.26
  5. Step 5: Solve for x
    x = 564,266,338.26/20,404.40
  6. Step 6: Final answer
    x = 27,654.15

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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.