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Finding the Fourth Proportional to 13,141.88, 19,712.82 and 3,907.88

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Solution

The fourth proportional to 13,141.88, 19,712.82 and 3,907.88 is: 5,861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.88 : 19,712.82 = 3,907.88 : x
  2. Step 2: Convert to fraction form
    13,141.88/19,712.82 = 3,907.88/x
  3. Step 3: Cross multiply
    13,141.88x = 19,712.82 × 3,907.88
  4. Step 4: Simplify right side
    13,141.88x = 77,035,236.46
  5. Step 5: Solve for x
    x = 77,035,236.46/13,141.88
  6. Step 6: Final answer
    x = 5,861.81

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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.