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Finding the Fourth Proportional to 15,899.03, 21,940.99 and 8,729.23

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Solution

The fourth proportional to 15,899.03, 21,940.99 and 8,729.23 is: 12,046.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,899.03 : 21,940.99 = 8,729.23 : x
  2. Step 2: Convert to fraction form
    15,899.03/21,940.99 = 8,729.23/x
  3. Step 3: Cross multiply
    15,899.03x = 21,940.99 × 8,729.23
  4. Step 4: Simplify right side
    15,899.03x = 191,527,948.14
  5. Step 5: Solve for x
    x = 191,527,948.14/15,899.03
  6. Step 6: Final answer
    x = 12,046.52

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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.