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Finding the Fourth Proportional to 18,703.45, 25,811.04 and 11,154.16

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Solution

The fourth proportional to 18,703.45, 25,811.04 and 11,154.16 is: 15,392.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.45 : 25,811.04 = 11,154.16 : x
  2. Step 2: Convert to fraction form
    18,703.45/25,811.04 = 11,154.16/x
  3. Step 3: Cross multiply
    18,703.45x = 25,811.04 × 11,154.16
  4. Step 4: Simplify right side
    18,703.45x = 287,900,469.93
  5. Step 5: Solve for x
    x = 287,900,469.93/18,703.45
  6. Step 6: Final answer
    x = 15,392.91

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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.