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Finding the Fourth Proportional to 12,602.69, 18,879.42 and 9,264.78

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Solution

The fourth proportional to 12,602.69, 18,879.42 and 9,264.78 is: 13,879.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,602.69 : 18,879.42 = 9,264.78 : x
  2. Step 2: Convert to fraction form
    12,602.69/18,879.42 = 9,264.78/x
  3. Step 3: Cross multiply
    12,602.69x = 18,879.42 × 9,264.78
  4. Step 4: Simplify right side
    12,602.69x = 174,913,578.43
  5. Step 5: Solve for x
    x = 174,913,578.43/12,602.69
  6. Step 6: Final answer
    x = 13,879.07

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1.5x scale

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.