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Finding the Fourth Proportional to 12,378.81, 18,572.94 and 7,451.94

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Solution

The fourth proportional to 12,378.81, 18,572.94 and 7,451.94 is: 11,180.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.81 : 18,572.94 = 7,451.94 : x
  2. Step 2: Convert to fraction form
    12,378.81/18,572.94 = 7,451.94/x
  3. Step 3: Cross multiply
    12,378.81x = 18,572.94 × 7,451.94
  4. Step 4: Simplify right side
    12,378.81x = 138,404,434.50
  5. Step 5: Solve for x
    x = 138,404,434.50/12,378.81
  6. Step 6: Final answer
    x = 11,180.75

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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.