Home / 21,381.32-29,486.99-13,819.70

Finding the Fourth Proportional to 21,381.32, 29,486.99 and 13,819.70

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Solution

The fourth proportional to 21,381.32, 29,486.99 and 13,819.70 is: 19,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.32 : 29,486.99 = 13,819.70 : x
  2. Step 2: Convert to fraction form
    21,381.32/29,486.99 = 13,819.70/x
  3. Step 3: Cross multiply
    21,381.32x = 29,486.99 × 13,819.70
  4. Step 4: Simplify right side
    21,381.32x = 407,501,463.97
  5. Step 5: Solve for x
    x = 407,501,463.97/21,381.32
  6. Step 6: Final answer
    x = 19,058.76

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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.