Home / 20,210.31-27,890.73-11,257.65

Finding the Fourth Proportional to 20,210.31, 27,890.73 and 11,257.65

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Solution

The fourth proportional to 20,210.31, 27,890.73 and 11,257.65 is: 15,535.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.31 : 27,890.73 = 11,257.65 : x
  2. Step 2: Convert to fraction form
    20,210.31/27,890.73 = 11,257.65/x
  3. Step 3: Cross multiply
    20,210.31x = 27,890.73 × 11,257.65
  4. Step 4: Simplify right side
    20,210.31x = 313,984,076.58
  5. Step 5: Solve for x
    x = 313,984,076.58/20,210.31
  6. Step 6: Final answer
    x = 15,535.84

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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.