Home / 20,862-28,789.58-11,430.64

Finding the Fourth Proportional to 20,862, 28,789.58 and 11,430.64

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Solution

The fourth proportional to 20,862, 28,789.58 and 11,430.64 is: 15,774.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862 : 28,789.58 = 11,430.64 : x
  2. Step 2: Convert to fraction form
    20,862/28,789.58 = 11,430.64/x
  3. Step 3: Cross multiply
    20,862x = 28,789.58 × 11,430.64
  4. Step 4: Simplify right side
    20,862x = 329,083,324.73
  5. Step 5: Solve for x
    x = 329,083,324.73/20,862
  6. Step 6: Final answer
    x = 15,774.29

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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.