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Finding the Fourth Proportional to 14,989.63, 20,673.17 and 11,221.71

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Solution

The fourth proportional to 14,989.63, 20,673.17 and 11,221.71 is: 15,476.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.63 : 20,673.17 = 11,221.71 : x
  2. Step 2: Convert to fraction form
    14,989.63/20,673.17 = 11,221.71/x
  3. Step 3: Cross multiply
    14,989.63x = 20,673.17 × 11,221.71
  4. Step 4: Simplify right side
    14,989.63x = 231,988,304.49
  5. Step 5: Solve for x
    x = 231,988,304.49/14,989.63
  6. Step 6: Final answer
    x = 15,476.59

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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.