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Finding the Fourth Proportional to 12,811.89, 17,679.85 and 9,453.49

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Solution

The fourth proportional to 12,811.89, 17,679.85 and 9,453.49 is: 13,045.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.89 : 17,679.85 = 9,453.49 : x
  2. Step 2: Convert to fraction form
    12,811.89/17,679.85 = 9,453.49/x
  3. Step 3: Cross multiply
    12,811.89x = 17,679.85 × 9,453.49
  4. Step 4: Simplify right side
    12,811.89x = 167,136,285.18
  5. Step 5: Solve for x
    x = 167,136,285.18/12,811.89
  6. Step 6: Final answer
    x = 13,045.40

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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.