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Finding the Fourth Proportional to 29,166.80, 40,249.16 and 15,918.80

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Solution

The fourth proportional to 29,166.80, 40,249.16 and 15,918.80 is: 21,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,166.80 : 40,249.16 = 15,918.80 : x
  2. Step 2: Convert to fraction form
    29,166.80/40,249.16 = 15,918.80/x
  3. Step 3: Cross multiply
    29,166.80x = 40,249.16 × 15,918.80
  4. Step 4: Simplify right side
    29,166.80x = 640,718,328.21
  5. Step 5: Solve for x
    x = 640,718,328.21/29,166.80
  6. Step 6: Final answer
    x = 21,967.39

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1.5x scale

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.