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Finding the Fourth Proportional to 18,561.25, 25,615.24 and 11,011.55

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Solution

The fourth proportional to 18,561.25, 25,615.24 and 11,011.55 is: 15,196.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.25 : 25,615.24 = 11,011.55 : x
  2. Step 2: Convert to fraction form
    18,561.25/25,615.24 = 11,011.55/x
  3. Step 3: Cross multiply
    18,561.25x = 25,615.24 × 11,011.55
  4. Step 4: Simplify right side
    18,561.25x = 282,063,340.42
  5. Step 5: Solve for x
    x = 282,063,340.42/18,561.25
  6. Step 6: Final answer
    x = 15,196.35

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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.