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Finding the Fourth Proportional to 18,300.96, 25,255.31 and 9,917.46

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Solution

The fourth proportional to 18,300.96, 25,255.31 and 9,917.46 is: 13,686.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.96 : 25,255.31 = 9,917.46 : x
  2. Step 2: Convert to fraction form
    18,300.96/25,255.31 = 9,917.46/x
  3. Step 3: Cross multiply
    18,300.96x = 25,255.31 × 9,917.46
  4. Step 4: Simplify right side
    18,300.96x = 250,468,477.13
  5. Step 5: Solve for x
    x = 250,468,477.13/18,300.96
  6. Step 6: Final answer
    x = 13,686.08

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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.