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Finding the Fourth Proportional to 19,940.90, 27,519.99 and 10,990.01

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Solution

The fourth proportional to 19,940.90, 27,519.99 and 10,990.01 is: 15,167.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,940.90 : 27,519.99 = 10,990.01 : x
  2. Step 2: Convert to fraction form
    19,940.90/27,519.99 = 10,990.01/x
  3. Step 3: Cross multiply
    19,940.90x = 27,519.99 × 10,990.01
  4. Step 4: Simplify right side
    19,940.90x = 302,444,965.30
  5. Step 5: Solve for x
    x = 302,444,965.30/19,940.90
  6. Step 6: Final answer
    x = 15,167.07

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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.