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Finding the Fourth Proportional to 18,995.81, 28,484.77 and 11,100.61

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Solution

The fourth proportional to 18,995.81, 28,484.77 and 11,100.61 is: 16,645.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.81 : 28,484.77 = 11,100.61 : x
  2. Step 2: Convert to fraction form
    18,995.81/28,484.77 = 11,100.61/x
  3. Step 3: Cross multiply
    18,995.81x = 28,484.77 × 11,100.61
  4. Step 4: Simplify right side
    18,995.81x = 316,198,322.71
  5. Step 5: Solve for x
    x = 316,198,322.71/18,995.81
  6. Step 6: Final answer
    x = 16,645.69

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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.