Home / 20,827.64-28,742.56-11,396.42

Finding the Fourth Proportional to 20,827.64, 28,742.56 and 11,396.42

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Solution

The fourth proportional to 20,827.64, 28,742.56 and 11,396.42 is: 15,727.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.64 : 28,742.56 = 11,396.42 : x
  2. Step 2: Convert to fraction form
    20,827.64/28,742.56 = 11,396.42/x
  3. Step 3: Cross multiply
    20,827.64x = 28,742.56 × 11,396.42
  4. Step 4: Simplify right side
    20,827.64x = 327,562,285.64
  5. Step 5: Solve for x
    x = 327,562,285.64/20,827.64
  6. Step 6: Final answer
    x = 15,727.29

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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.