Home / 20,728.67-28,610.18-13,173.53

Finding the Fourth Proportional to 20,728.67, 28,610.18 and 13,173.53

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Solution

The fourth proportional to 20,728.67, 28,610.18 and 13,173.53 is: 18,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.67 : 28,610.18 = 13,173.53 : x
  2. Step 2: Convert to fraction form
    20,728.67/28,610.18 = 13,173.53/x
  3. Step 3: Cross multiply
    20,728.67x = 28,610.18 × 13,173.53
  4. Step 4: Simplify right side
    20,728.67x = 376,896,855.62
  5. Step 5: Solve for x
    x = 376,896,855.62/20,728.67
  6. Step 6: Final answer
    x = 18,182.40

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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.