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Finding the Fourth Proportional to 12,881.97, 17,643.87 and 12,125.43

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Solution

The fourth proportional to 12,881.97, 17,643.87 and 12,125.43 is: 16,607.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.97 : 17,643.87 = 12,125.43 : x
  2. Step 2: Convert to fraction form
    12,881.97/17,643.87 = 12,125.43/x
  3. Step 3: Cross multiply
    12,881.97x = 17,643.87 × 12,125.43
  4. Step 4: Simplify right side
    12,881.97x = 213,939,510.61
  5. Step 5: Solve for x
    x = 213,939,510.61/12,881.97
  6. Step 6: Final answer
    x = 16,607.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.