Home / 12,939.99-19,406.90-3,579.81

Finding the Fourth Proportional to 12,939.99, 19,406.90 and 3,579.81

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Solution

The fourth proportional to 12,939.99, 19,406.90 and 3,579.81 is: 5,368.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.99 : 19,406.90 = 3,579.81 : x
  2. Step 2: Convert to fraction form
    12,939.99/19,406.90 = 3,579.81/x
  3. Step 3: Cross multiply
    12,939.99x = 19,406.90 × 3,579.81
  4. Step 4: Simplify right side
    12,939.99x = 69,472,924.01
  5. Step 5: Solve for x
    x = 69,472,924.01/12,939.99
  6. Step 6: Final answer
    x = 5,368.85

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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.