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Finding the Fourth Proportional to 29,420.87, 40,610.09 and 18,810.54

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Solution

The fourth proportional to 29,420.87, 40,610.09 and 18,810.54 is: 25,964.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,420.87 : 40,610.09 = 18,810.54 : x
  2. Step 2: Convert to fraction form
    29,420.87/40,610.09 = 18,810.54/x
  3. Step 3: Cross multiply
    29,420.87x = 40,610.09 × 18,810.54
  4. Step 4: Simplify right side
    29,420.87x = 763,897,815.85
  5. Step 5: Solve for x
    x = 763,897,815.85/29,420.87
  6. Step 6: Final answer
    x = 25,964.49

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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.