Home / 20,485.17-28,198.42-17,661.87

Finding the Fourth Proportional to 20,485.17, 28,198.42 and 17,661.87

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Solution

The fourth proportional to 20,485.17, 28,198.42 and 17,661.87 is: 24,312.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.17 : 28,198.42 = 17,661.87 : x
  2. Step 2: Convert to fraction form
    20,485.17/28,198.42 = 17,661.87/x
  3. Step 3: Cross multiply
    20,485.17x = 28,198.42 × 17,661.87
  4. Step 4: Simplify right side
    20,485.17x = 498,036,784.09
  5. Step 5: Solve for x
    x = 498,036,784.09/20,485.17
  6. Step 6: Final answer
    x = 24,312.06

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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.