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Finding the Fourth Proportional to 17,721.90, 26,576.45 and 8,953.90

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Solution

The fourth proportional to 17,721.90, 26,576.45 and 8,953.90 is: 13,427.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,721.90 : 26,576.45 = 8,953.90 : x
  2. Step 2: Convert to fraction form
    17,721.90/26,576.45 = 8,953.90/x
  3. Step 3: Cross multiply
    17,721.90x = 26,576.45 × 8,953.90
  4. Step 4: Simplify right side
    17,721.90x = 237,962,875.66
  5. Step 5: Solve for x
    x = 237,962,875.66/17,721.90
  6. Step 6: Final answer
    x = 13,427.62

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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.