Home / 12,678.24-18,924.47-11,181.92

Finding the Fourth Proportional to 12,678.24, 18,924.47 and 11,181.92

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Solution

The fourth proportional to 12,678.24, 18,924.47 and 11,181.92 is: 16,690.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.24 : 18,924.47 = 11,181.92 : x
  2. Step 2: Convert to fraction form
    12,678.24/18,924.47 = 11,181.92/x
  3. Step 3: Cross multiply
    12,678.24x = 18,924.47 × 11,181.92
  4. Step 4: Simplify right side
    12,678.24x = 211,611,984.85
  5. Step 5: Solve for x
    x = 211,611,984.85/12,678.24
  6. Step 6: Final answer
    x = 16,690.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.