Home / 20,813.04-28,724.76-13,382.64

Finding the Fourth Proportional to 20,813.04, 28,724.76 and 13,382.64

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Solution

The fourth proportional to 20,813.04, 28,724.76 and 13,382.64 is: 18,469.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.04 : 28,724.76 = 13,382.64 : x
  2. Step 2: Convert to fraction form
    20,813.04/28,724.76 = 13,382.64/x
  3. Step 3: Cross multiply
    20,813.04x = 28,724.76 × 13,382.64
  4. Step 4: Simplify right side
    20,813.04x = 384,413,122.17
  5. Step 5: Solve for x
    x = 384,413,122.17/20,813.04
  6. Step 6: Final answer
    x = 18,469.82

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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.