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Finding the Fourth Proportional to 17,716.40, 26,639.40 and 14,865.20

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Solution

The fourth proportional to 17,716.40, 26,639.40 and 14,865.20 is: 22,352.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,716.40 : 26,639.40 = 14,865.20 : x
  2. Step 2: Convert to fraction form
    17,716.40/26,639.40 = 14,865.20/x
  3. Step 3: Cross multiply
    17,716.40x = 26,639.40 × 14,865.20
  4. Step 4: Simplify right side
    17,716.40x = 396,000,008.88
  5. Step 5: Solve for x
    x = 396,000,008.88/17,716.40
  6. Step 6: Final answer
    x = 22,352.17

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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.