Home / 20,813.27-28,724.94-13,649.21

Finding the Fourth Proportional to 20,813.27, 28,724.94 and 13,649.21

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Solution

The fourth proportional to 20,813.27, 28,724.94 and 13,649.21 is: 18,837.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.27 : 28,724.94 = 13,649.21 : x
  2. Step 2: Convert to fraction form
    20,813.27/28,724.94 = 13,649.21/x
  3. Step 3: Cross multiply
    20,813.27x = 28,724.94 × 13,649.21
  4. Step 4: Simplify right side
    20,813.27x = 392,072,810.11
  5. Step 5: Solve for x
    x = 392,072,810.11/20,813.27
  6. Step 6: Final answer
    x = 18,837.63

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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.