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Finding the Fourth Proportional to 22,605.21, 31,191.21 and 13,042.89

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Solution

The fourth proportional to 22,605.21, 31,191.21 and 13,042.89 is: 17,996.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,605.21 : 31,191.21 = 13,042.89 : x
  2. Step 2: Convert to fraction form
    22,605.21/31,191.21 = 13,042.89/x
  3. Step 3: Cross multiply
    22,605.21x = 31,191.21 × 13,042.89
  4. Step 4: Simplify right side
    22,605.21x = 406,823,521.00
  5. Step 5: Solve for x
    x = 406,823,521.00/22,605.21
  6. Step 6: Final answer
    x = 17,996.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.