Home / 18,721.20-28,083.24-5,572.56

Finding the Fourth Proportional to 18,721.20, 28,083.24 and 5,572.56

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Solution

The fourth proportional to 18,721.20, 28,083.24 and 5,572.56 is: 8,359.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.20 : 28,083.24 = 5,572.56 : x
  2. Step 2: Convert to fraction form
    18,721.20/28,083.24 = 5,572.56/x
  3. Step 3: Cross multiply
    18,721.20x = 28,083.24 × 5,572.56
  4. Step 4: Simplify right side
    18,721.20x = 156,495,539.89
  5. Step 5: Solve for x
    x = 156,495,539.89/18,721.20
  6. Step 6: Final answer
    x = 8,359.27

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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.