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Finding the Fourth Proportional to 18,813.56, 25,964.92 and 11,259.80

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Solution

The fourth proportional to 18,813.56, 25,964.92 and 11,259.80 is: 15,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.56 : 25,964.92 = 11,259.80 : x
  2. Step 2: Convert to fraction form
    18,813.56/25,964.92 = 11,259.80/x
  3. Step 3: Cross multiply
    18,813.56x = 25,964.92 × 11,259.80
  4. Step 4: Simplify right side
    18,813.56x = 292,359,806.22
  5. Step 5: Solve for x
    x = 292,359,806.22/18,813.56
  6. Step 6: Final answer
    x = 15,539.84

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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.