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Finding the Fourth Proportional to 28,829.61, 43,239.02 and 13,243.41

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Solution

The fourth proportional to 28,829.61, 43,239.02 and 13,243.41 is: 19,862.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,829.61 : 43,239.02 = 13,243.41 : x
  2. Step 2: Convert to fraction form
    28,829.61/43,239.02 = 13,243.41/x
  3. Step 3: Cross multiply
    28,829.61x = 43,239.02 × 13,243.41
  4. Step 4: Simplify right side
    28,829.61x = 572,632,003.64
  5. Step 5: Solve for x
    x = 572,632,003.64/28,829.61
  6. Step 6: Final answer
    x = 19,862.63

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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.