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Finding the Fourth Proportional to 18,012.99, 27,000.78 and 7,488.75

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Solution

The fourth proportional to 18,012.99, 27,000.78 and 7,488.75 is: 11,225.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,012.99 : 27,000.78 = 7,488.75 : x
  2. Step 2: Convert to fraction form
    18,012.99/27,000.78 = 7,488.75/x
  3. Step 3: Cross multiply
    18,012.99x = 27,000.78 × 7,488.75
  4. Step 4: Simplify right side
    18,012.99x = 202,202,091.23
  5. Step 5: Solve for x
    x = 202,202,091.23/18,012.99
  6. Step 6: Final answer
    x = 11,225.35

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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.