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Finding the Fourth Proportional to 18,891.90, 28,298.94 and 11,081.88

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Solution

The fourth proportional to 18,891.90, 28,298.94 and 11,081.88 is: 16,600.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.90 : 28,298.94 = 11,081.88 : x
  2. Step 2: Convert to fraction form
    18,891.90/28,298.94 = 11,081.88/x
  3. Step 3: Cross multiply
    18,891.90x = 28,298.94 × 11,081.88
  4. Step 4: Simplify right side
    18,891.90x = 313,605,457.21
  5. Step 5: Solve for x
    x = 313,605,457.21/18,891.90
  6. Step 6: Final answer
    x = 16,600.00

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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.