Home / 20,270.25-27,972.63-11,317.88

Finding the Fourth Proportional to 20,270.25, 27,972.63 and 11,317.88

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Solution

The fourth proportional to 20,270.25, 27,972.63 and 11,317.88 is: 15,618.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.25 : 27,972.63 = 11,317.88 : x
  2. Step 2: Convert to fraction form
    20,270.25/27,972.63 = 11,317.88/x
  3. Step 3: Cross multiply
    20,270.25x = 27,972.63 × 11,317.88
  4. Step 4: Simplify right side
    20,270.25x = 316,590,939.56
  5. Step 5: Solve for x
    x = 316,590,939.56/20,270.25
  6. Step 6: Final answer
    x = 15,618.50

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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.