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Finding the Fourth Proportional to 14,245.80, 21,368.70 and 12,131.70

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Solution

The fourth proportional to 14,245.80, 21,368.70 and 12,131.70 is: 18,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,245.80 : 21,368.70 = 12,131.70 : x
  2. Step 2: Convert to fraction form
    14,245.80/21,368.70 = 12,131.70/x
  3. Step 3: Cross multiply
    14,245.80x = 21,368.70 × 12,131.70
  4. Step 4: Simplify right side
    14,245.80x = 259,238,657.79
  5. Step 5: Solve for x
    x = 259,238,657.79/14,245.80
  6. Step 6: Final answer
    x = 18,197.55

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Similar ratio
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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.