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Finding the Fourth Proportional to 29,208.78, 40,308.09 and 15,960.78

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Solution

The fourth proportional to 29,208.78, 40,308.09 and 15,960.78 is: 22,025.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,208.78 : 40,308.09 = 15,960.78 : x
  2. Step 2: Convert to fraction form
    29,208.78/40,308.09 = 15,960.78/x
  3. Step 3: Cross multiply
    29,208.78x = 40,308.09 × 15,960.78
  4. Step 4: Simplify right side
    29,208.78x = 643,348,556.71
  5. Step 5: Solve for x
    x = 643,348,556.71/29,208.78
  6. Step 6: Final answer
    x = 22,025.86

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1.5x scale

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.