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Finding the Fourth Proportional to 18,962.74, 28,447.08 and 5,813.74

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Solution

The fourth proportional to 18,962.74, 28,447.08 and 5,813.74 is: 8,721.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.74 : 28,447.08 = 5,813.74 : x
  2. Step 2: Convert to fraction form
    18,962.74/28,447.08 = 5,813.74/x
  3. Step 3: Cross multiply
    18,962.74x = 28,447.08 × 5,813.74
  4. Step 4: Simplify right side
    18,962.74x = 165,383,926.88
  5. Step 5: Solve for x
    x = 165,383,926.88/18,962.74
  6. Step 6: Final answer
    x = 8,721.52

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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.