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Finding the Fourth Proportional to 14,001.78, 20,996.43 and 7,426.47

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Solution

The fourth proportional to 14,001.78, 20,996.43 and 7,426.47 is: 11,136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,001.78 : 20,996.43 = 7,426.47 : x
  2. Step 2: Convert to fraction form
    14,001.78/20,996.43 = 7,426.47/x
  3. Step 3: Cross multiply
    14,001.78x = 20,996.43 × 7,426.47
  4. Step 4: Simplify right side
    14,001.78x = 155,929,357.50
  5. Step 5: Solve for x
    x = 155,929,357.50/14,001.78
  6. Step 6: Final answer
    x = 11,136.40

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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.