Home / 20,861.70-28,788.66-11,301.20

Finding the Fourth Proportional to 20,861.70, 28,788.66 and 11,301.20

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Solution

The fourth proportional to 20,861.70, 28,788.66 and 11,301.20 is: 15,595.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.70 : 28,788.66 = 11,301.20 : x
  2. Step 2: Convert to fraction form
    20,861.70/28,788.66 = 11,301.20/x
  3. Step 3: Cross multiply
    20,861.70x = 28,788.66 × 11,301.20
  4. Step 4: Simplify right side
    20,861.70x = 325,346,404.39
  5. Step 5: Solve for x
    x = 325,346,404.39/20,861.70
  6. Step 6: Final answer
    x = 15,595.39

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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.