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Finding the Fourth Proportional to 18,993.11, 26,206.02 and 11,030.61

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Solution

The fourth proportional to 18,993.11, 26,206.02 and 11,030.61 is: 15,219.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.11 : 26,206.02 = 11,030.61 : x
  2. Step 2: Convert to fraction form
    18,993.11/26,206.02 = 11,030.61/x
  3. Step 3: Cross multiply
    18,993.11x = 26,206.02 × 11,030.61
  4. Step 4: Simplify right side
    18,993.11x = 289,068,386.27
  5. Step 5: Solve for x
    x = 289,068,386.27/18,993.11
  6. Step 6: Final answer
    x = 15,219.64

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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.