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Finding the Fourth Proportional to 18,889.92, 28,331.04 and 17,953.20

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Solution

The fourth proportional to 18,889.92, 28,331.04 and 17,953.20 is: 26,926.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.92 : 28,331.04 = 17,953.20 : x
  2. Step 2: Convert to fraction form
    18,889.92/28,331.04 = 17,953.20/x
  3. Step 3: Cross multiply
    18,889.92x = 28,331.04 × 17,953.20
  4. Step 4: Simplify right side
    18,889.92x = 508,632,827.33
  5. Step 5: Solve for x
    x = 508,632,827.33/18,889.92
  6. Step 6: Final answer
    x = 26,926.15

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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.