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Finding the Fourth Proportional to 14,291.28, 19,721.28 and 8,003.28

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Solution

The fourth proportional to 14,291.28, 19,721.28 and 8,003.28 is: 11,044.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,291.28 : 19,721.28 = 8,003.28 : x
  2. Step 2: Convert to fraction form
    14,291.28/19,721.28 = 8,003.28/x
  3. Step 3: Cross multiply
    14,291.28x = 19,721.28 × 8,003.28
  4. Step 4: Simplify right side
    14,291.28x = 157,834,925.80
  5. Step 5: Solve for x
    x = 157,834,925.80/14,291.28
  6. Step 6: Final answer
    x = 11,044.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.