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Finding the Fourth Proportional to 18,900.20, 26,081.90 and 11,830.52

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Solution

The fourth proportional to 18,900.20, 26,081.90 and 11,830.52 is: 16,325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.20 : 26,081.90 = 11,830.52 : x
  2. Step 2: Convert to fraction form
    18,900.20/26,081.90 = 11,830.52/x
  3. Step 3: Cross multiply
    18,900.20x = 26,081.90 × 11,830.52
  4. Step 4: Simplify right side
    18,900.20x = 308,562,490.00
  5. Step 5: Solve for x
    x = 308,562,490.00/18,900.20
  6. Step 6: Final answer
    x = 16,325.88

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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.