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Finding the Fourth Proportional to 28,905.60, 43,390.80 and 22,360.80

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Solution

The fourth proportional to 28,905.60, 43,390.80 and 22,360.80 is: 33,566.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,905.60 : 43,390.80 = 22,360.80 : x
  2. Step 2: Convert to fraction form
    28,905.60/43,390.80 = 22,360.80/x
  3. Step 3: Cross multiply
    28,905.60x = 43,390.80 × 22,360.80
  4. Step 4: Simplify right side
    28,905.60x = 970,253,000.64
  5. Step 5: Solve for x
    x = 970,253,000.64/28,905.60
  6. Step 6: Final answer
    x = 33,566.26

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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.