Home / 20,815.16-28,724.94-11,383.74

Finding the Fourth Proportional to 20,815.16, 28,724.94 and 11,383.74

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Solution

The fourth proportional to 20,815.16, 28,724.94 and 11,383.74 is: 15,709.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.16 : 28,724.94 = 11,383.74 : x
  2. Step 2: Convert to fraction form
    20,815.16/28,724.94 = 11,383.74/x
  3. Step 3: Cross multiply
    20,815.16x = 28,724.94 × 11,383.74
  4. Step 4: Simplify right side
    20,815.16x = 326,997,248.48
  5. Step 5: Solve for x
    x = 326,997,248.48/20,815.16
  6. Step 6: Final answer
    x = 15,709.58

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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.