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Finding the Fourth Proportional to 18,275.60, 27,413.40 and 7,178.60

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Solution

The fourth proportional to 18,275.60, 27,413.40 and 7,178.60 is: 10,767.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.60 : 27,413.40 = 7,178.60 : x
  2. Step 2: Convert to fraction form
    18,275.60/27,413.40 = 7,178.60/x
  3. Step 3: Cross multiply
    18,275.60x = 27,413.40 × 7,178.60
  4. Step 4: Simplify right side
    18,275.60x = 196,789,833.24
  5. Step 5: Solve for x
    x = 196,789,833.24/18,275.60
  6. Step 6: Final answer
    x = 10,767.90

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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.