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Finding the Fourth Proportional to 13,757.66, 20,664.93 and 11,128.10

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Solution

The fourth proportional to 13,757.66, 20,664.93 and 11,128.10 is: 16,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.66 : 20,664.93 = 11,128.10 : x
  2. Step 2: Convert to fraction form
    13,757.66/20,664.93 = 11,128.10/x
  3. Step 3: Cross multiply
    13,757.66x = 20,664.93 × 11,128.10
  4. Step 4: Simplify right side
    13,757.66x = 229,961,407.53
  5. Step 5: Solve for x
    x = 229,961,407.53/13,757.66
  6. Step 6: Final answer
    x = 16,715.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.