Home / 12,812.85-19,219.30-3,578.85

Finding the Fourth Proportional to 12,812.85, 19,219.30 and 3,578.85

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Solution

The fourth proportional to 12,812.85, 19,219.30 and 3,578.85 is: 5,368.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.85 : 19,219.30 = 3,578.85 : x
  2. Step 2: Convert to fraction form
    12,812.85/19,219.30 = 3,578.85/x
  3. Step 3: Cross multiply
    12,812.85x = 19,219.30 × 3,578.85
  4. Step 4: Simplify right side
    12,812.85x = 68,782,895.71
  5. Step 5: Solve for x
    x = 68,782,895.71/12,812.85
  6. Step 6: Final answer
    x = 5,368.28

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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.