Home / 28,213.83-42,339.09-12,218.99

Finding the Fourth Proportional to 28,213.83, 42,339.09 and 12,218.99

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Solution

The fourth proportional to 28,213.83, 42,339.09 and 12,218.99 is: 18,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.83 : 42,339.09 = 12,218.99 : x
  2. Step 2: Convert to fraction form
    28,213.83/42,339.09 = 12,218.99/x
  3. Step 3: Cross multiply
    28,213.83x = 42,339.09 × 12,218.99
  4. Step 4: Simplify right side
    28,213.83x = 517,340,705.62
  5. Step 5: Solve for x
    x = 517,340,705.62/28,213.83
  6. Step 6: Final answer
    x = 18,336.42

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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.