Home / 20,679.48-28,536.62-11,248.02

Finding the Fourth Proportional to 20,679.48, 28,536.62 and 11,248.02

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Solution

The fourth proportional to 20,679.48, 28,536.62 and 11,248.02 is: 15,521.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.48 : 28,536.62 = 11,248.02 : x
  2. Step 2: Convert to fraction form
    20,679.48/28,536.62 = 11,248.02/x
  3. Step 3: Cross multiply
    20,679.48x = 28,536.62 × 11,248.02
  4. Step 4: Simplify right side
    20,679.48x = 320,980,416.25
  5. Step 5: Solve for x
    x = 320,980,416.25/20,679.48
  6. Step 6: Final answer
    x = 15,521.69

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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.