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Finding the Fourth Proportional to 18,794.31, 28,186.61 and 8,913.93

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Solution

The fourth proportional to 18,794.31, 28,186.61 and 8,913.93 is: 13,368.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794.31 : 28,186.61 = 8,913.93 : x
  2. Step 2: Convert to fraction form
    18,794.31/28,186.61 = 8,913.93/x
  3. Step 3: Cross multiply
    18,794.31x = 28,186.61 × 8,913.93
  4. Step 4: Simplify right side
    18,794.31x = 251,253,423.91
  5. Step 5: Solve for x
    x = 251,253,423.91/18,794.31
  6. Step 6: Final answer
    x = 13,368.59

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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.