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Finding the Fourth Proportional to 21,996.71, 30,347.51 and 14,447.13

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Solution

The fourth proportional to 21,996.71, 30,347.51 and 14,447.13 is: 19,931.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.71 : 30,347.51 = 14,447.13 : x
  2. Step 2: Convert to fraction form
    21,996.71/30,347.51 = 14,447.13/x
  3. Step 3: Cross multiply
    21,996.71x = 30,347.51 × 14,447.13
  4. Step 4: Simplify right side
    21,996.71x = 438,434,573.43
  5. Step 5: Solve for x
    x = 438,434,573.43/21,996.71
  6. Step 6: Final answer
    x = 19,931.82

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Half scale
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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.