Home / 21,351.69-29,466.45-11,919.69

Finding the Fourth Proportional to 21,351.69, 29,466.45 and 11,919.69

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Solution

The fourth proportional to 21,351.69, 29,466.45 and 11,919.69 is: 16,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.69 : 29,466.45 = 11,919.69 : x
  2. Step 2: Convert to fraction form
    21,351.69/29,466.45 = 11,919.69/x
  3. Step 3: Cross multiply
    21,351.69x = 29,466.45 × 11,919.69
  4. Step 4: Simplify right side
    21,351.69x = 351,230,949.40
  5. Step 5: Solve for x
    x = 351,230,949.40/21,351.69
  6. Step 6: Final answer
    x = 16,449.80

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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.