Home / 20,618.56-28,439.52-13,163.20

Finding the Fourth Proportional to 20,618.56, 28,439.52 and 13,163.20

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Solution

The fourth proportional to 20,618.56, 28,439.52 and 13,163.20 is: 18,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.56 : 28,439.52 = 13,163.20 : x
  2. Step 2: Convert to fraction form
    20,618.56/28,439.52 = 13,163.20/x
  3. Step 3: Cross multiply
    20,618.56x = 28,439.52 × 13,163.20
  4. Step 4: Simplify right side
    20,618.56x = 374,355,089.66
  5. Step 5: Solve for x
    x = 374,355,089.66/20,618.56
  6. Step 6: Final answer
    x = 18,156.22

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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.