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Finding the Fourth Proportional to 12,278.33, 18,435.95 and 7,369.93

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Solution

The fourth proportional to 12,278.33, 18,435.95 and 7,369.93 is: 11,065.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.33 : 18,435.95 = 7,369.93 : x
  2. Step 2: Convert to fraction form
    12,278.33/18,435.95 = 7,369.93/x
  3. Step 3: Cross multiply
    12,278.33x = 18,435.95 × 7,369.93
  4. Step 4: Simplify right side
    12,278.33x = 135,871,660.98
  5. Step 5: Solve for x
    x = 135,871,660.98/12,278.33
  6. Step 6: Final answer
    x = 11,065.97

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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.