Home / 20,828.36-28,743.08-11,396.90

Finding the Fourth Proportional to 20,828.36, 28,743.08 and 11,396.90

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Solution

The fourth proportional to 20,828.36, 28,743.08 and 11,396.90 is: 15,727.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.36 : 28,743.08 = 11,396.90 : x
  2. Step 2: Convert to fraction form
    20,828.36/28,743.08 = 11,396.90/x
  3. Step 3: Cross multiply
    20,828.36x = 28,743.08 × 11,396.90
  4. Step 4: Simplify right side
    20,828.36x = 327,582,008.45
  5. Step 5: Solve for x
    x = 327,582,008.45/20,828.36
  6. Step 6: Final answer
    x = 15,727.69

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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.