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Finding the Fourth Proportional to 12,181.88, 18,235.56 and 7,803.56

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Solution

The fourth proportional to 12,181.88, 18,235.56 and 7,803.56 is: 11,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.88 : 18,235.56 = 7,803.56 : x
  2. Step 2: Convert to fraction form
    12,181.88/18,235.56 = 7,803.56/x
  3. Step 3: Cross multiply
    12,181.88x = 18,235.56 × 7,803.56
  4. Step 4: Simplify right side
    12,181.88x = 142,302,286.59
  5. Step 5: Solve for x
    x = 142,302,286.59/12,181.88
  6. Step 6: Final answer
    x = 11,681.47

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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.