Home / 20,679.72-28,538.24-11,248.35

Finding the Fourth Proportional to 20,679.72, 28,538.24 and 11,248.35

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Solution

The fourth proportional to 20,679.72, 28,538.24 and 11,248.35 is: 15,522.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.72 : 28,538.24 = 11,248.35 : x
  2. Step 2: Convert to fraction form
    20,679.72/28,538.24 = 11,248.35/x
  3. Step 3: Cross multiply
    20,679.72x = 28,538.24 × 11,248.35
  4. Step 4: Simplify right side
    20,679.72x = 321,008,055.66
  5. Step 5: Solve for x
    x = 321,008,055.66/20,679.72
  6. Step 6: Final answer
    x = 15,522.84

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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.