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Finding the Fourth Proportional to 18,887.94, 26,065.08 and 12,919.41

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Solution

The fourth proportional to 18,887.94, 26,065.08 and 12,919.41 is: 17,828.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.94 : 26,065.08 = 12,919.41 : x
  2. Step 2: Convert to fraction form
    18,887.94/26,065.08 = 12,919.41/x
  3. Step 3: Cross multiply
    18,887.94x = 26,065.08 × 12,919.41
  4. Step 4: Simplify right side
    18,887.94x = 336,745,455.20
  5. Step 5: Solve for x
    x = 336,745,455.20/18,887.94
  6. Step 6: Final answer
    x = 17,828.60

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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.