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Finding the Fourth Proportional to 12,691.49, 19,039.10 and 3,927.11

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Solution

The fourth proportional to 12,691.49, 19,039.10 and 3,927.11 is: 5,891.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.49 : 19,039.10 = 3,927.11 : x
  2. Step 2: Convert to fraction form
    12,691.49/19,039.10 = 3,927.11/x
  3. Step 3: Cross multiply
    12,691.49x = 19,039.10 × 3,927.11
  4. Step 4: Simplify right side
    12,691.49x = 74,768,525.17
  5. Step 5: Solve for x
    x = 74,768,525.17/12,691.49
  6. Step 6: Final answer
    x = 5,891.24

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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.