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Finding the Fourth Proportional to 18,817.58, 28,201.10 and 13,225.70

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Solution

The fourth proportional to 18,817.58, 28,201.10 and 13,225.70 is: 19,820.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.58 : 28,201.10 = 13,225.70 : x
  2. Step 2: Convert to fraction form
    18,817.58/28,201.10 = 13,225.70/x
  3. Step 3: Cross multiply
    18,817.58x = 28,201.10 × 13,225.70
  4. Step 4: Simplify right side
    18,817.58x = 372,979,292.64
  5. Step 5: Solve for x
    x = 372,979,292.64/18,817.58
  6. Step 6: Final answer
    x = 19,820.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.