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Finding the Fourth Proportional to 27,020.43, 40,486.91 and 20,459.43

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Solution

The fourth proportional to 27,020.43, 40,486.91 and 20,459.43 is: 30,656.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,020.43 : 40,486.91 = 20,459.43 : x
  2. Step 2: Convert to fraction form
    27,020.43/40,486.91 = 20,459.43/x
  3. Step 3: Cross multiply
    27,020.43x = 40,486.91 × 20,459.43
  4. Step 4: Simplify right side
    27,020.43x = 828,338,998.76
  5. Step 5: Solve for x
    x = 828,338,998.76/27,020.43
  6. Step 6: Final answer
    x = 30,656.03

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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.