Home / 21,084.35-29,102.45-13,919.49

Finding the Fourth Proportional to 21,084.35, 29,102.45 and 13,919.49

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Solution

The fourth proportional to 21,084.35, 29,102.45 and 13,919.49 is: 19,212.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.35 : 29,102.45 = 13,919.49 : x
  2. Step 2: Convert to fraction form
    21,084.35/29,102.45 = 13,919.49/x
  3. Step 3: Cross multiply
    21,084.35x = 29,102.45 × 13,919.49
  4. Step 4: Simplify right side
    21,084.35x = 405,091,192.15
  5. Step 5: Solve for x
    x = 405,091,192.15/21,084.35
  6. Step 6: Final answer
    x = 19,212.89

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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.