Home / 20,861.54-28,789.37-11,430.10

Finding the Fourth Proportional to 20,861.54, 28,789.37 and 11,430.10

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Solution

The fourth proportional to 20,861.54, 28,789.37 and 11,430.10 is: 15,773.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.54 : 28,789.37 = 11,430.10 : x
  2. Step 2: Convert to fraction form
    20,861.54/28,789.37 = 11,430.10/x
  3. Step 3: Cross multiply
    20,861.54x = 28,789.37 × 11,430.10
  4. Step 4: Simplify right side
    20,861.54x = 329,065,334.64
  5. Step 5: Solve for x
    x = 329,065,334.64/20,861.54
  6. Step 6: Final answer
    x = 15,773.78

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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.