Home / 12,812.68-19,219.78-3,578.68

Finding the Fourth Proportional to 12,812.68, 19,219.78 and 3,578.68

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Solution

The fourth proportional to 12,812.68, 19,219.78 and 3,578.68 is: 5,368.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.68 : 19,219.78 = 3,578.68 : x
  2. Step 2: Convert to fraction form
    12,812.68/19,219.78 = 3,578.68/x
  3. Step 3: Cross multiply
    12,812.68x = 19,219.78 × 3,578.68
  4. Step 4: Simplify right side
    12,812.68x = 68,781,442.29
  5. Step 5: Solve for x
    x = 68,781,442.29/12,812.68
  6. Step 6: Final answer
    x = 5,368.23

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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.