Home / 12,911.32-19,369.50-4,145.56

Finding the Fourth Proportional to 12,911.32, 19,369.50 and 4,145.56

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Solution

The fourth proportional to 12,911.32, 19,369.50 and 4,145.56 is: 6,219.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.32 : 19,369.50 = 4,145.56 : x
  2. Step 2: Convert to fraction form
    12,911.32/19,369.50 = 4,145.56/x
  3. Step 3: Cross multiply
    12,911.32x = 19,369.50 × 4,145.56
  4. Step 4: Simplify right side
    12,911.32x = 80,297,424.42
  5. Step 5: Solve for x
    x = 80,297,424.42/12,911.32
  6. Step 6: Final answer
    x = 6,219.15

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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.