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Finding the Fourth Proportional to 18,916.71, 26,104.75 and 10,419.64

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Solution

The fourth proportional to 18,916.71, 26,104.75 and 10,419.64 is: 14,378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.71 : 26,104.75 = 10,419.64 : x
  2. Step 2: Convert to fraction form
    18,916.71/26,104.75 = 10,419.64/x
  3. Step 3: Cross multiply
    18,916.71x = 26,104.75 × 10,419.64
  4. Step 4: Simplify right side
    18,916.71x = 272,002,005.98
  5. Step 5: Solve for x
    x = 272,002,005.98/18,916.71
  6. Step 6: Final answer
    x = 14,378.93

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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.