Home / 12,813.32-19,219.21-4,919.61

Finding the Fourth Proportional to 12,813.32, 19,219.21 and 4,919.61

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Solution

The fourth proportional to 12,813.32, 19,219.21 and 4,919.61 is: 7,379.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.32 : 19,219.21 = 4,919.61 : x
  2. Step 2: Convert to fraction form
    12,813.32/19,219.21 = 4,919.61/x
  3. Step 3: Cross multiply
    12,813.32x = 19,219.21 × 4,919.61
  4. Step 4: Simplify right side
    12,813.32x = 94,551,017.71
  5. Step 5: Solve for x
    x = 94,551,017.71/12,813.32
  6. Step 6: Final answer
    x = 7,379.12

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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.