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Finding the Fourth Proportional to 18,695.78, 25,798.38 and 10,311.74

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Solution

The fourth proportional to 18,695.78, 25,798.38 and 10,311.74 is: 14,229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.78 : 25,798.38 = 10,311.74 : x
  2. Step 2: Convert to fraction form
    18,695.78/25,798.38 = 10,311.74/x
  3. Step 3: Cross multiply
    18,695.78x = 25,798.38 × 10,311.74
  4. Step 4: Simplify right side
    18,695.78x = 266,026,174.07
  5. Step 5: Solve for x
    x = 266,026,174.07/18,695.78
  6. Step 6: Final answer
    x = 14,229.21

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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.