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Finding the Fourth Proportional to 13,418.10, 20,127.09 and 11,425.17

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Solution

The fourth proportional to 13,418.10, 20,127.09 and 11,425.17 is: 17,137.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.10 : 20,127.09 = 11,425.17 : x
  2. Step 2: Convert to fraction form
    13,418.10/20,127.09 = 11,425.17/x
  3. Step 3: Cross multiply
    13,418.10x = 20,127.09 × 11,425.17
  4. Step 4: Simplify right side
    13,418.10x = 229,955,424.86
  5. Step 5: Solve for x
    x = 229,955,424.86/13,418.10
  6. Step 6: Final answer
    x = 17,137.70

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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.