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Finding the Fourth Proportional to 12,886, 19,329 and 5,590

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Solution

The fourth proportional to 12,886, 19,329 and 5,590 is: 8,385

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886 : 19,329 = 5,590 : x
  2. Step 2: Convert to fraction form
    12,886/19,329 = 5,590/x
  3. Step 3: Cross multiply
    12,886x = 19,329 × 5,590
  4. Step 4: Simplify right side
    12,886x = 108,049,110
  5. Step 5: Solve for x
    x = 108,049,110/12,886
  6. Step 6: Final answer
    x = 8,385

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.