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Finding the Fourth Proportional to 13,815.78, 19,057.88 and 8,506.82

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Solution

The fourth proportional to 13,815.78, 19,057.88 and 8,506.82 is: 11,734.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.78 : 19,057.88 = 8,506.82 : x
  2. Step 2: Convert to fraction form
    13,815.78/19,057.88 = 8,506.82/x
  3. Step 3: Cross multiply
    13,815.78x = 19,057.88 × 8,506.82
  4. Step 4: Simplify right side
    13,815.78x = 162,121,954.74
  5. Step 5: Solve for x
    x = 162,121,954.74/13,815.78
  6. Step 6: Final answer
    x = 11,734.55

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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.