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Finding the Fourth Proportional to 28,883.63, 43,287.70 and 20,905.27

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Solution

The fourth proportional to 28,883.63, 43,287.70 and 20,905.27 is: 31,330.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,883.63 : 43,287.70 = 20,905.27 : x
  2. Step 2: Convert to fraction form
    28,883.63/43,287.70 = 20,905.27/x
  3. Step 3: Cross multiply
    28,883.63x = 43,287.70 × 20,905.27
  4. Step 4: Simplify right side
    28,883.63x = 904,940,892.00
  5. Step 5: Solve for x
    x = 904,940,892.00/28,883.63
  6. Step 6: Final answer
    x = 31,330.58

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1.5x scale

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.