Home / 21,651.40-29,878.32-12,091.24

Finding the Fourth Proportional to 21,651.40, 29,878.32 and 12,091.24

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Solution

The fourth proportional to 21,651.40, 29,878.32 and 12,091.24 is: 16,685.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.40 : 29,878.32 = 12,091.24 : x
  2. Step 2: Convert to fraction form
    21,651.40/29,878.32 = 12,091.24/x
  3. Step 3: Cross multiply
    21,651.40x = 29,878.32 × 12,091.24
  4. Step 4: Simplify right side
    21,651.40x = 361,265,937.92
  5. Step 5: Solve for x
    x = 361,265,937.92/21,651.40
  6. Step 6: Final answer
    x = 16,685.57

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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.