Home / 20,727.62-28,601.90-13,920.28

Finding the Fourth Proportional to 20,727.62, 28,601.90 and 13,920.28

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Solution

The fourth proportional to 20,727.62, 28,601.90 and 13,920.28 is: 19,208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.62 : 28,601.90 = 13,920.28 : x
  2. Step 2: Convert to fraction form
    20,727.62/28,601.90 = 13,920.28/x
  3. Step 3: Cross multiply
    20,727.62x = 28,601.90 × 13,920.28
  4. Step 4: Simplify right side
    20,727.62x = 398,146,456.53
  5. Step 5: Solve for x
    x = 398,146,456.53/20,727.62
  6. Step 6: Final answer
    x = 19,208.50

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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.