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Finding the Fourth Proportional to 18,990.99, 26,207.15 and 11,033.15

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Solution

The fourth proportional to 18,990.99, 26,207.15 and 11,033.15 is: 15,225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.99 : 26,207.15 = 11,033.15 : x
  2. Step 2: Convert to fraction form
    18,990.99/26,207.15 = 11,033.15/x
  3. Step 3: Cross multiply
    18,990.99x = 26,207.15 × 11,033.15
  4. Step 4: Simplify right side
    18,990.99x = 289,147,230.82
  5. Step 5: Solve for x
    x = 289,147,230.82/18,990.99
  6. Step 6: Final answer
    x = 15,225.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.