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Finding the Fourth Proportional to 61,021.56, 91,540.80 and 18,904.98

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Solution

The fourth proportional to 61,021.56, 91,540.80 and 18,904.98 is: 28,360.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,021.56 : 91,540.80 = 18,904.98 : x
  2. Step 2: Convert to fraction form
    61,021.56/91,540.80 = 18,904.98/x
  3. Step 3: Cross multiply
    61,021.56x = 91,540.80 × 18,904.98
  4. Step 4: Simplify right side
    61,021.56x = 1,730,576,993.18
  5. Step 5: Solve for x
    x = 1,730,576,993.18/61,021.56
  6. Step 6: Final answer
    x = 28,360.09

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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.