Home / 21,142.97-29,190.75-13,196.87

Finding the Fourth Proportional to 21,142.97, 29,190.75 and 13,196.87

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Solution

The fourth proportional to 21,142.97, 29,190.75 and 13,196.87 is: 18,220.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.97 : 29,190.75 = 13,196.87 : x
  2. Step 2: Convert to fraction form
    21,142.97/29,190.75 = 13,196.87/x
  3. Step 3: Cross multiply
    21,142.97x = 29,190.75 × 13,196.87
  4. Step 4: Simplify right side
    21,142.97x = 385,226,722.52
  5. Step 5: Solve for x
    x = 385,226,722.52/21,142.97
  6. Step 6: Final answer
    x = 18,220.08

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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.