Home / 28,731.60-39,630.24-18,112.32

Finding the Fourth Proportional to 28,731.60, 39,630.24 and 18,112.32

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Solution

The fourth proportional to 28,731.60, 39,630.24 and 18,112.32 is: 24,982.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.60 : 39,630.24 = 18,112.32 : x
  2. Step 2: Convert to fraction form
    28,731.60/39,630.24 = 18,112.32/x
  3. Step 3: Cross multiply
    28,731.60x = 39,630.24 × 18,112.32
  4. Step 4: Simplify right side
    28,731.60x = 717,795,588.56
  5. Step 5: Solve for x
    x = 717,795,588.56/28,731.60
  6. Step 6: Final answer
    x = 24,982.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.