Home / 18,818.80-28,229.52-5,671.28

Finding the Fourth Proportional to 18,818.80, 28,229.52 and 5,671.28

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Solution

The fourth proportional to 18,818.80, 28,229.52 and 5,671.28 is: 8,507.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.80 : 28,229.52 = 5,671.28 : x
  2. Step 2: Convert to fraction form
    18,818.80/28,229.52 = 5,671.28/x
  3. Step 3: Cross multiply
    18,818.80x = 28,229.52 × 5,671.28
  4. Step 4: Simplify right side
    18,818.80x = 160,097,512.19
  5. Step 5: Solve for x
    x = 160,097,512.19/18,818.80
  6. Step 6: Final answer
    x = 8,507.32

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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.