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Finding the Fourth Proportional to 28,918.80, 43,277.40 and 17,240.40

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Solution

The fourth proportional to 28,918.80, 43,277.40 and 17,240.40 is: 25,800.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.80 : 43,277.40 = 17,240.40 : x
  2. Step 2: Convert to fraction form
    28,918.80/43,277.40 = 17,240.40/x
  3. Step 3: Cross multiply
    28,918.80x = 43,277.40 × 17,240.40
  4. Step 4: Simplify right side
    28,918.80x = 746,119,686.96
  5. Step 5: Solve for x
    x = 746,119,686.96/28,918.80
  6. Step 6: Final answer
    x = 25,800.51

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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.