Home / 21,513.53-29,688.57-11,954.97

Finding the Fourth Proportional to 21,513.53, 29,688.57 and 11,954.97

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Solution

The fourth proportional to 21,513.53, 29,688.57 and 11,954.97 is: 16,497.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.53 : 29,688.57 = 11,954.97 : x
  2. Step 2: Convert to fraction form
    21,513.53/29,688.57 = 11,954.97/x
  3. Step 3: Cross multiply
    21,513.53x = 29,688.57 × 11,954.97
  4. Step 4: Simplify right side
    21,513.53x = 354,925,963.69
  5. Step 5: Solve for x
    x = 354,925,963.69/21,513.53
  6. Step 6: Final answer
    x = 16,497.80

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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.