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Finding the Fourth Proportional to 21,997.71, 30,348.89 and 14,448.13

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Solution

The fourth proportional to 21,997.71, 30,348.89 and 14,448.13 is: 19,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.71 : 30,348.89 = 14,448.13 : x
  2. Step 2: Convert to fraction form
    21,997.71/30,348.89 = 14,448.13/x
  3. Step 3: Cross multiply
    21,997.71x = 30,348.89 × 14,448.13
  4. Step 4: Simplify right side
    21,997.71x = 438,484,708.08
  5. Step 5: Solve for x
    x = 438,484,708.08/21,997.71
  6. Step 6: Final answer
    x = 19,933.20

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Double scale
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Similar ratio
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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.