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Finding the Fourth Proportional to 22,992.40, 34,402.20 and 20,918.80

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Solution

The fourth proportional to 22,992.40, 34,402.20 and 20,918.80 is: 31,299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,992.40 : 34,402.20 = 20,918.80 : x
  2. Step 2: Convert to fraction form
    22,992.40/34,402.20 = 20,918.80/x
  3. Step 3: Cross multiply
    22,992.40x = 34,402.20 × 20,918.80
  4. Step 4: Simplify right side
    22,992.40x = 719,652,741.36
  5. Step 5: Solve for x
    x = 719,652,741.36/22,992.40
  6. Step 6: Final answer
    x = 31,299.59

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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.