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Finding the Fourth Proportional to 18,614.99, 25,688.89 and 10,117.11

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Solution

The fourth proportional to 18,614.99, 25,688.89 and 10,117.11 is: 13,961.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.99 : 25,688.89 = 10,117.11 : x
  2. Step 2: Convert to fraction form
    18,614.99/25,688.89 = 10,117.11/x
  3. Step 3: Cross multiply
    18,614.99x = 25,688.89 × 10,117.11
  4. Step 4: Simplify right side
    18,614.99x = 259,897,275.32
  5. Step 5: Solve for x
    x = 259,897,275.32/18,614.99
  6. Step 6: Final answer
    x = 13,961.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.