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Finding the Fourth Proportional to 18,886.35, 26,063.06 and 10,389

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Solution

The fourth proportional to 18,886.35, 26,063.06 and 10,389 is: 14,336.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886.35 : 26,063.06 = 10,389 : x
  2. Step 2: Convert to fraction form
    18,886.35/26,063.06 = 10,389/x
  3. Step 3: Cross multiply
    18,886.35x = 26,063.06 × 10,389
  4. Step 4: Simplify right side
    18,886.35x = 270,769,078.40
  5. Step 5: Solve for x
    x = 270,769,078.40/18,886.35
  6. Step 6: Final answer
    x = 14,336.76

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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.