Home / 20,728.59-28,610.07-13,173.45

Finding the Fourth Proportional to 20,728.59, 28,610.07 and 13,173.45

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Solution

The fourth proportional to 20,728.59, 28,610.07 and 13,173.45 is: 18,182.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.59 : 28,610.07 = 13,173.45 : x
  2. Step 2: Convert to fraction form
    20,728.59/28,610.07 = 13,173.45/x
  3. Step 3: Cross multiply
    20,728.59x = 28,610.07 × 13,173.45
  4. Step 4: Simplify right side
    20,728.59x = 376,893,326.64
  5. Step 5: Solve for x
    x = 376,893,326.64/20,728.59
  6. Step 6: Final answer
    x = 18,182.29

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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.