Home / 12,981.78-19,471.23-4,216.68

Finding the Fourth Proportional to 12,981.78, 19,471.23 and 4,216.68

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Solution

The fourth proportional to 12,981.78, 19,471.23 and 4,216.68 is: 6,324.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.78 : 19,471.23 = 4,216.68 : x
  2. Step 2: Convert to fraction form
    12,981.78/19,471.23 = 4,216.68/x
  3. Step 3: Cross multiply
    12,981.78x = 19,471.23 × 4,216.68
  4. Step 4: Simplify right side
    12,981.78x = 82,103,946.12
  5. Step 5: Solve for x
    x = 82,103,946.12/12,981.78
  6. Step 6: Final answer
    x = 6,324.55

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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.