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Finding the Fourth Proportional to 21,199.97, 31,789.02 and 11,210.11

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Solution

The fourth proportional to 21,199.97, 31,789.02 and 11,210.11 is: 16,809.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.97 : 31,789.02 = 11,210.11 : x
  2. Step 2: Convert to fraction form
    21,199.97/31,789.02 = 11,210.11/x
  3. Step 3: Cross multiply
    21,199.97x = 31,789.02 × 11,210.11
  4. Step 4: Simplify right side
    21,199.97x = 356,358,410.99
  5. Step 5: Solve for x
    x = 356,358,410.99/21,199.97
  6. Step 6: Final answer
    x = 16,809.38

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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.