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Finding the Fourth Proportional to 18,788.96, 28,187.40 and 7,101.92

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Solution

The fourth proportional to 18,788.96, 28,187.40 and 7,101.92 is: 10,654.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.96 : 28,187.40 = 7,101.92 : x
  2. Step 2: Convert to fraction form
    18,788.96/28,187.40 = 7,101.92/x
  3. Step 3: Cross multiply
    18,788.96x = 28,187.40 × 7,101.92
  4. Step 4: Simplify right side
    18,788.96x = 200,184,659.81
  5. Step 5: Solve for x
    x = 200,184,659.81/18,788.96
  6. Step 6: Final answer
    x = 10,654.38

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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.