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Finding the Fourth Proportional to 18,891.83, 28,298.86 and 11,081.81

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Solution

The fourth proportional to 18,891.83, 28,298.86 and 11,081.81 is: 16,599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.83 : 28,298.86 = 11,081.81 : x
  2. Step 2: Convert to fraction form
    18,891.83/28,298.86 = 11,081.81/x
  3. Step 3: Cross multiply
    18,891.83x = 28,298.86 × 11,081.81
  4. Step 4: Simplify right side
    18,891.83x = 313,602,632.78
  5. Step 5: Solve for x
    x = 313,602,632.78/18,891.83
  6. Step 6: Final answer
    x = 16,599.91

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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.