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Finding the Fourth Proportional to 28,892.80, 43,339.20 and 20,555.20

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Solution

The fourth proportional to 28,892.80, 43,339.20 and 20,555.20 is: 30,832.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,892.80 : 43,339.20 = 20,555.20 : x
  2. Step 2: Convert to fraction form
    28,892.80/43,339.20 = 20,555.20/x
  3. Step 3: Cross multiply
    28,892.80x = 43,339.20 × 20,555.20
  4. Step 4: Simplify right side
    28,892.80x = 890,845,923.84
  5. Step 5: Solve for x
    x = 890,845,923.84/28,892.80
  6. Step 6: Final answer
    x = 30,832.80

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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.