Home / 12,821.21-19,218.55-4,921.62

Finding the Fourth Proportional to 12,821.21, 19,218.55 and 4,921.62

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Solution

The fourth proportional to 12,821.21, 19,218.55 and 4,921.62 is: 7,377.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.21 : 19,218.55 = 4,921.62 : x
  2. Step 2: Convert to fraction form
    12,821.21/19,218.55 = 4,921.62/x
  3. Step 3: Cross multiply
    12,821.21x = 19,218.55 × 4,921.62
  4. Step 4: Simplify right side
    12,821.21x = 94,586,400.05
  5. Step 5: Solve for x
    x = 94,586,400.05/12,821.21
  6. Step 6: Final answer
    x = 7,377.34

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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.