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Finding the Fourth Proportional to 18,331.79, 27,472.80 and 7,788.59

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Solution

The fourth proportional to 18,331.79, 27,472.80 and 7,788.59 is: 11,672.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,331.79 : 27,472.80 = 7,788.59 : x
  2. Step 2: Convert to fraction form
    18,331.79/27,472.80 = 7,788.59/x
  3. Step 3: Cross multiply
    18,331.79x = 27,472.80 × 7,788.59
  4. Step 4: Simplify right side
    18,331.79x = 213,974,237.99
  5. Step 5: Solve for x
    x = 213,974,237.99/18,331.79
  6. Step 6: Final answer
    x = 11,672.31

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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.