Home / 15,815.21-21,826.11-8,741.48

Finding the Fourth Proportional to 15,815.21, 21,826.11 and 8,741.48

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Solution

The fourth proportional to 15,815.21, 21,826.11 and 8,741.48 is: 12,063.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.21 : 21,826.11 = 8,741.48 : x
  2. Step 2: Convert to fraction form
    15,815.21/21,826.11 = 8,741.48/x
  3. Step 3: Cross multiply
    15,815.21x = 21,826.11 × 8,741.48
  4. Step 4: Simplify right side
    15,815.21x = 190,792,394.91
  5. Step 5: Solve for x
    x = 190,792,394.91/15,815.21
  6. Step 6: Final answer
    x = 12,063.86

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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.