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Finding the Fourth Proportional to 19,881.20, 29,820.08 and 6,733.28

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Solution

The fourth proportional to 19,881.20, 29,820.08 and 6,733.28 is: 10,099.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.20 : 29,820.08 = 6,733.28 : x
  2. Step 2: Convert to fraction form
    19,881.20/29,820.08 = 6,733.28/x
  3. Step 3: Cross multiply
    19,881.20x = 29,820.08 × 6,733.28
  4. Step 4: Simplify right side
    19,881.20x = 200,786,948.26
  5. Step 5: Solve for x
    x = 200,786,948.26/19,881.20
  6. Step 6: Final answer
    x = 10,099.34

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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.