Home / 20,687.91-28,548.48-11,256.27

Finding the Fourth Proportional to 20,687.91, 28,548.48 and 11,256.27

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Solution

The fourth proportional to 20,687.91, 28,548.48 and 11,256.27 is: 15,533.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.91 : 28,548.48 = 11,256.27 : x
  2. Step 2: Convert to fraction form
    20,687.91/28,548.48 = 11,256.27/x
  3. Step 3: Cross multiply
    20,687.91x = 28,548.48 × 11,256.27
  4. Step 4: Simplify right side
    20,687.91x = 321,349,398.97
  5. Step 5: Solve for x
    x = 321,349,398.97/20,687.91
  6. Step 6: Final answer
    x = 15,533.20

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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.