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Finding the Fourth Proportional to 17,912.80, 26,840.40 and 14,975.20

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Solution

The fourth proportional to 17,912.80, 26,840.40 and 14,975.20 is: 22,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,912.80 : 26,840.40 = 14,975.20 : x
  2. Step 2: Convert to fraction form
    17,912.80/26,840.40 = 14,975.20/x
  3. Step 3: Cross multiply
    17,912.80x = 26,840.40 × 14,975.20
  4. Step 4: Simplify right side
    17,912.80x = 401,940,358.08
  5. Step 5: Solve for x
    x = 401,940,358.08/17,912.80
  6. Step 6: Final answer
    x = 22,438.72

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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.