Home / 12,209.72-18,315.93-4,819.28

Finding the Fourth Proportional to 12,209.72, 18,315.93 and 4,819.28

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Solution

The fourth proportional to 12,209.72, 18,315.93 and 4,819.28 is: 7,229.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.72 : 18,315.93 = 4,819.28 : x
  2. Step 2: Convert to fraction form
    12,209.72/18,315.93 = 4,819.28/x
  3. Step 3: Cross multiply
    12,209.72x = 18,315.93 × 4,819.28
  4. Step 4: Simplify right side
    12,209.72x = 88,269,595.13
  5. Step 5: Solve for x
    x = 88,269,595.13/12,209.72
  6. Step 6: Final answer
    x = 7,229.45

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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.