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Finding the Fourth Proportional to 18,777.22, 28,160.07 and 12,971.14

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Solution

The fourth proportional to 18,777.22, 28,160.07 and 12,971.14 is: 19,452.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.22 : 28,160.07 = 12,971.14 : x
  2. Step 2: Convert to fraction form
    18,777.22/28,160.07 = 12,971.14/x
  3. Step 3: Cross multiply
    18,777.22x = 28,160.07 × 12,971.14
  4. Step 4: Simplify right side
    18,777.22x = 365,268,210.38
  5. Step 5: Solve for x
    x = 365,268,210.38/18,777.22
  6. Step 6: Final answer
    x = 19,452.73

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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.