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Finding the Fourth Proportional to 18,603.81, 27,900.25 and 5,454.47

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Solution

The fourth proportional to 18,603.81, 27,900.25 and 5,454.47 is: 8,180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.81 : 27,900.25 = 5,454.47 : x
  2. Step 2: Convert to fraction form
    18,603.81/27,900.25 = 5,454.47/x
  3. Step 3: Cross multiply
    18,603.81x = 27,900.25 × 5,454.47
  4. Step 4: Simplify right side
    18,603.81x = 152,181,132.73
  5. Step 5: Solve for x
    x = 152,181,132.73/18,603.81
  6. Step 6: Final answer
    x = 8,180.11

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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.