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Finding the Fourth Proportional to 18,785.57, 25,922.33 and 11,230.40

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Solution

The fourth proportional to 18,785.57, 25,922.33 and 11,230.40 is: 15,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.57 : 25,922.33 = 11,230.40 : x
  2. Step 2: Convert to fraction form
    18,785.57/25,922.33 = 11,230.40/x
  3. Step 3: Cross multiply
    18,785.57x = 25,922.33 × 11,230.40
  4. Step 4: Simplify right side
    18,785.57x = 291,118,039.79
  5. Step 5: Solve for x
    x = 291,118,039.79/18,785.57
  6. Step 6: Final answer
    x = 15,496.90

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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.