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Finding the Fourth Proportional to 19,563.78, 29,331.08 and 11,770.78

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Solution

The fourth proportional to 19,563.78, 29,331.08 and 11,770.78 is: 17,647.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,563.78 : 29,331.08 = 11,770.78 : x
  2. Step 2: Convert to fraction form
    19,563.78/29,331.08 = 11,770.78/x
  3. Step 3: Cross multiply
    19,563.78x = 29,331.08 × 11,770.78
  4. Step 4: Simplify right side
    19,563.78x = 345,249,689.84
  5. Step 5: Solve for x
    x = 345,249,689.84/19,563.78
  6. Step 6: Final answer
    x = 17,647.39

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1.5x scale

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.