Home / 28,917.60-43,318.80-20,162.40

Finding the Fourth Proportional to 28,917.60, 43,318.80 and 20,162.40

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Solution

The fourth proportional to 28,917.60, 43,318.80 and 20,162.40 is: 30,203.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,917.60 : 43,318.80 = 20,162.40 : x
  2. Step 2: Convert to fraction form
    28,917.60/43,318.80 = 20,162.40/x
  3. Step 3: Cross multiply
    28,917.60x = 43,318.80 × 20,162.40
  4. Step 4: Simplify right side
    28,917.60x = 873,410,973.12
  5. Step 5: Solve for x
    x = 873,410,973.12/28,917.60
  6. Step 6: Final answer
    x = 30,203.44

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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.