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Finding the Fourth Proportional to 18,701.69, 25,611.80 and 18,455.65

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Solution

The fourth proportional to 18,701.69, 25,611.80 and 18,455.65 is: 25,274.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.69 : 25,611.80 = 18,455.65 : x
  2. Step 2: Convert to fraction form
    18,701.69/25,611.80 = 18,455.65/x
  3. Step 3: Cross multiply
    18,701.69x = 25,611.80 × 18,455.65
  4. Step 4: Simplify right side
    18,701.69x = 472,682,260.36
  5. Step 5: Solve for x
    x = 472,682,260.36/18,701.69
  6. Step 6: Final answer
    x = 25,274.85

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.