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Finding the Fourth Proportional to 30,675.78, 45,992.21 and 11,940.08

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Solution

The fourth proportional to 30,675.78, 45,992.21 and 11,940.08 is: 17,901.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,675.78 : 45,992.21 = 11,940.08 : x
  2. Step 2: Convert to fraction form
    30,675.78/45,992.21 = 11,940.08/x
  3. Step 3: Cross multiply
    30,675.78x = 45,992.21 × 11,940.08
  4. Step 4: Simplify right side
    30,675.78x = 549,150,377.12
  5. Step 5: Solve for x
    x = 549,150,377.12/30,675.78
  6. Step 6: Final answer
    x = 17,901.76

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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.