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Finding the Fourth Proportional to 28,991.79, 43,504.40 and 15,664.82

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Solution

The fourth proportional to 28,991.79, 43,504.40 and 15,664.82 is: 23,506.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.79 : 43,504.40 = 15,664.82 : x
  2. Step 2: Convert to fraction form
    28,991.79/43,504.40 = 15,664.82/x
  3. Step 3: Cross multiply
    28,991.79x = 43,504.40 × 15,664.82
  4. Step 4: Simplify right side
    28,991.79x = 681,488,561.23
  5. Step 5: Solve for x
    x = 681,488,561.23/28,991.79
  6. Step 6: Final answer
    x = 23,506.26

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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.