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Finding the Fourth Proportional to 13,675.58, 20,519.53 and 8,418.58

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Solution

The fourth proportional to 13,675.58, 20,519.53 and 8,418.58 is: 12,631.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,675.58 : 20,519.53 = 8,418.58 : x
  2. Step 2: Convert to fraction form
    13,675.58/20,519.53 = 8,418.58/x
  3. Step 3: Cross multiply
    13,675.58x = 20,519.53 × 8,418.58
  4. Step 4: Simplify right side
    13,675.58x = 172,745,347.94
  5. Step 5: Solve for x
    x = 172,745,347.94/13,675.58
  6. Step 6: Final answer
    x = 12,631.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.