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Finding the Fourth Proportional to 19,506.78, 29,260.14 and 5,655.78

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Solution

The fourth proportional to 19,506.78, 29,260.14 and 5,655.78 is: 8,483.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,506.78 : 29,260.14 = 5,655.78 : x
  2. Step 2: Convert to fraction form
    19,506.78/29,260.14 = 5,655.78/x
  3. Step 3: Cross multiply
    19,506.78x = 29,260.14 × 5,655.78
  4. Step 4: Simplify right side
    19,506.78x = 165,488,914.61
  5. Step 5: Solve for x
    x = 165,488,914.61/19,506.78
  6. Step 6: Final answer
    x = 8,483.66

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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.