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Finding the Fourth Proportional to 21,373.48, 29,496.90 and 13,921.48

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Solution

The fourth proportional to 21,373.48, 29,496.90 and 13,921.48 is: 19,212.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,373.48 : 29,496.90 = 13,921.48 : x
  2. Step 2: Convert to fraction form
    21,373.48/29,496.90 = 13,921.48/x
  3. Step 3: Cross multiply
    21,373.48x = 29,496.90 × 13,921.48
  4. Step 4: Simplify right side
    21,373.48x = 410,640,503.41
  5. Step 5: Solve for x
    x = 410,640,503.41/21,373.48
  6. Step 6: Final answer
    x = 19,212.62

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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.