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Finding the Fourth Proportional to 12,636.77, 18,947.05 and 5,246.33

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Solution

The fourth proportional to 12,636.77, 18,947.05 and 5,246.33 is: 7,866.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.77 : 18,947.05 = 5,246.33 : x
  2. Step 2: Convert to fraction form
    12,636.77/18,947.05 = 5,246.33/x
  3. Step 3: Cross multiply
    12,636.77x = 18,947.05 × 5,246.33
  4. Step 4: Simplify right side
    12,636.77x = 99,402,368.98
  5. Step 5: Solve for x
    x = 99,402,368.98/12,636.77
  6. Step 6: Final answer
    x = 7,866.12

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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.