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Finding the Fourth Proportional to 28,881.88, 43,309.86 and 13,291

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Solution

The fourth proportional to 28,881.88, 43,309.86 and 13,291 is: 19,930.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,881.88 : 43,309.86 = 13,291 : x
  2. Step 2: Convert to fraction form
    28,881.88/43,309.86 = 13,291/x
  3. Step 3: Cross multiply
    28,881.88x = 43,309.86 × 13,291
  4. Step 4: Simplify right side
    28,881.88x = 575,631,349.26
  5. Step 5: Solve for x
    x = 575,631,349.26/28,881.88
  6. Step 6: Final answer
    x = 19,930.54

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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.