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Finding the Fourth Proportional to 18,844.99, 26,000.74 and 12,134.50

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Solution

The fourth proportional to 18,844.99, 26,000.74 and 12,134.50 is: 16,742.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,844.99 : 26,000.74 = 12,134.50 : x
  2. Step 2: Convert to fraction form
    18,844.99/26,000.74 = 12,134.50/x
  3. Step 3: Cross multiply
    18,844.99x = 26,000.74 × 12,134.50
  4. Step 4: Simplify right side
    18,844.99x = 315,505,979.53
  5. Step 5: Solve for x
    x = 315,505,979.53/18,844.99
  6. Step 6: Final answer
    x = 16,742.17

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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.