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Finding the Fourth Proportional to 13,647.73, 18,834.98 and 7,679.05

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Solution

The fourth proportional to 13,647.73, 18,834.98 and 7,679.05 is: 10,597.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,647.73 : 18,834.98 = 7,679.05 : x
  2. Step 2: Convert to fraction form
    13,647.73/18,834.98 = 7,679.05/x
  3. Step 3: Cross multiply
    13,647.73x = 18,834.98 × 7,679.05
  4. Step 4: Simplify right side
    13,647.73x = 144,634,714.77
  5. Step 5: Solve for x
    x = 144,634,714.77/13,647.73
  6. Step 6: Final answer
    x = 10,597.71

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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.