Home / 21,378.89-29,502.91-11,947.46

Finding the Fourth Proportional to 21,378.89, 29,502.91 and 11,947.46

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Solution

The fourth proportional to 21,378.89, 29,502.91 and 11,947.46 is: 16,487.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.89 : 29,502.91 = 11,947.46 : x
  2. Step 2: Convert to fraction form
    21,378.89/29,502.91 = 11,947.46/x
  3. Step 3: Cross multiply
    21,378.89x = 29,502.91 × 11,947.46
  4. Step 4: Simplify right side
    21,378.89x = 352,484,704.53
  5. Step 5: Solve for x
    x = 352,484,704.53/21,378.89
  6. Step 6: Final answer
    x = 16,487.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.