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Finding the Fourth Proportional to 21,906.98, 32,888.72 and 18,806.91

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Solution

The fourth proportional to 21,906.98, 32,888.72 and 18,806.91 is: 28,234.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.98 : 32,888.72 = 18,806.91 : x
  2. Step 2: Convert to fraction form
    21,906.98/32,888.72 = 18,806.91/x
  3. Step 3: Cross multiply
    21,906.98x = 32,888.72 × 18,806.91
  4. Step 4: Simplify right side
    21,906.98x = 618,535,244.07
  5. Step 5: Solve for x
    x = 618,535,244.07/21,906.98
  6. Step 6: Final answer
    x = 28,234.62

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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.