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Finding the Fourth Proportional to 12,553.94, 18,721.20 and 11,001.16

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Solution

The fourth proportional to 12,553.94, 18,721.20 and 11,001.16 is: 16,405.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,553.94 : 18,721.20 = 11,001.16 : x
  2. Step 2: Convert to fraction form
    12,553.94/18,721.20 = 11,001.16/x
  3. Step 3: Cross multiply
    12,553.94x = 18,721.20 × 11,001.16
  4. Step 4: Simplify right side
    12,553.94x = 205,954,916.59
  5. Step 5: Solve for x
    x = 205,954,916.59/12,553.94
  6. Step 6: Final answer
    x = 16,405.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.