Home / 20,640.48-28,464.24-13,927.20

Finding the Fourth Proportional to 20,640.48, 28,464.24 and 13,927.20

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Solution

The fourth proportional to 20,640.48, 28,464.24 and 13,927.20 is: 19,206.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.48 : 28,464.24 = 13,927.20 : x
  2. Step 2: Convert to fraction form
    20,640.48/28,464.24 = 13,927.20/x
  3. Step 3: Cross multiply
    20,640.48x = 28,464.24 × 13,927.20
  4. Step 4: Simplify right side
    20,640.48x = 396,427,163.33
  5. Step 5: Solve for x
    x = 396,427,163.33/20,640.48
  6. Step 6: Final answer
    x = 19,206.30

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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.