Home / 21,185.31-29,232.67-13,641.87

Finding the Fourth Proportional to 21,185.31, 29,232.67 and 13,641.87

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Solution

The fourth proportional to 21,185.31, 29,232.67 and 13,641.87 is: 18,823.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.31 : 29,232.67 = 13,641.87 : x
  2. Step 2: Convert to fraction form
    21,185.31/29,232.67 = 13,641.87/x
  3. Step 3: Cross multiply
    21,185.31x = 29,232.67 × 13,641.87
  4. Step 4: Simplify right side
    21,185.31x = 398,788,258.92
  5. Step 5: Solve for x
    x = 398,788,258.92/21,185.31
  6. Step 6: Final answer
    x = 18,823.81

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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.