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Finding the Fourth Proportional to 14,064.88, 19,408.90 and 7,691.30

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Solution

The fourth proportional to 14,064.88, 19,408.90 and 7,691.30 is: 10,613.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,064.88 : 19,408.90 = 7,691.30 : x
  2. Step 2: Convert to fraction form
    14,064.88/19,408.90 = 7,691.30/x
  3. Step 3: Cross multiply
    14,064.88x = 19,408.90 × 7,691.30
  4. Step 4: Simplify right side
    14,064.88x = 149,279,672.57
  5. Step 5: Solve for x
    x = 149,279,672.57/14,064.88
  6. Step 6: Final answer
    x = 10,613.65

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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.