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Finding the Fourth Proportional to 28,855.60, 43,326.60 and 20,129.20

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Solution

The fourth proportional to 28,855.60, 43,326.60 and 20,129.20 is: 30,223.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.60 : 43,326.60 = 20,129.20 : x
  2. Step 2: Convert to fraction form
    28,855.60/43,326.60 = 20,129.20/x
  3. Step 3: Cross multiply
    28,855.60x = 43,326.60 × 20,129.20
  4. Step 4: Simplify right side
    28,855.60x = 872,129,796.72
  5. Step 5: Solve for x
    x = 872,129,796.72/28,855.60
  6. Step 6: Final answer
    x = 30,223.94

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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.