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Finding the Fourth Proportional to 18,889.83, 28,335.78 and 5,742.27

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Solution

The fourth proportional to 18,889.83, 28,335.78 and 5,742.27 is: 8,613.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.83 : 28,335.78 = 5,742.27 : x
  2. Step 2: Convert to fraction form
    18,889.83/28,335.78 = 5,742.27/x
  3. Step 3: Cross multiply
    18,889.83x = 28,335.78 × 5,742.27
  4. Step 4: Simplify right side
    18,889.83x = 162,711,699.42
  5. Step 5: Solve for x
    x = 162,711,699.42/18,889.83
  6. Step 6: Final answer
    x = 8,613.72

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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.