Home / 20,774.56-28,670-13,695.88

Finding the Fourth Proportional to 20,774.56, 28,670 and 13,695.88

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Solution

The fourth proportional to 20,774.56, 28,670 and 13,695.88 is: 18,901.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.56 : 28,670 = 13,695.88 : x
  2. Step 2: Convert to fraction form
    20,774.56/28,670 = 13,695.88/x
  3. Step 3: Cross multiply
    20,774.56x = 28,670 × 13,695.88
  4. Step 4: Simplify right side
    20,774.56x = 392,660,879.60
  5. Step 5: Solve for x
    x = 392,660,879.60/20,774.56
  6. Step 6: Final answer
    x = 18,901.04

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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.