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Finding the Fourth Proportional to 18,603.54, 25,665.59 and 10,641.51

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Solution

The fourth proportional to 18,603.54, 25,665.59 and 10,641.51 is: 14,681.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.54 : 25,665.59 = 10,641.51 : x
  2. Step 2: Convert to fraction form
    18,603.54/25,665.59 = 10,641.51/x
  3. Step 3: Cross multiply
    18,603.54x = 25,665.59 × 10,641.51
  4. Step 4: Simplify right side
    18,603.54x = 273,120,659.24
  5. Step 5: Solve for x
    x = 273,120,659.24/18,603.54
  6. Step 6: Final answer
    x = 14,681.11

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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.