Home / 20,210.39-27,890.28-11,257.79

Finding the Fourth Proportional to 20,210.39, 27,890.28 and 11,257.79

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Solution

The fourth proportional to 20,210.39, 27,890.28 and 11,257.79 is: 15,535.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.39 : 27,890.28 = 11,257.79 : x
  2. Step 2: Convert to fraction form
    20,210.39/27,890.28 = 11,257.79/x
  3. Step 3: Cross multiply
    20,210.39x = 27,890.28 × 11,257.79
  4. Step 4: Simplify right side
    20,210.39x = 313,982,985.01
  5. Step 5: Solve for x
    x = 313,982,985.01/20,210.39
  6. Step 6: Final answer
    x = 15,535.73

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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.