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Finding the Fourth Proportional to 18,425.60, 27,638.40 and 18,231.20

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Solution

The fourth proportional to 18,425.60, 27,638.40 and 18,231.20 is: 27,346.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.60 : 27,638.40 = 18,231.20 : x
  2. Step 2: Convert to fraction form
    18,425.60/27,638.40 = 18,231.20/x
  3. Step 3: Cross multiply
    18,425.60x = 27,638.40 × 18,231.20
  4. Step 4: Simplify right side
    18,425.60x = 503,881,198.08
  5. Step 5: Solve for x
    x = 503,881,198.08/18,425.60
  6. Step 6: Final answer
    x = 27,346.80

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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.