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Finding the Fourth Proportional to 28,980.40, 43,373.40 and 25,481.20

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Solution

The fourth proportional to 28,980.40, 43,373.40 and 25,481.20 is: 38,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,980.40 : 43,373.40 = 25,481.20 : x
  2. Step 2: Convert to fraction form
    28,980.40/43,373.40 = 25,481.20/x
  3. Step 3: Cross multiply
    28,980.40x = 43,373.40 × 25,481.20
  4. Step 4: Simplify right side
    28,980.40x = 1,105,206,280.08
  5. Step 5: Solve for x
    x = 1,105,206,280.08/28,980.40
  6. Step 6: Final answer
    x = 38,136.34

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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.