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Finding the Fourth Proportional to 13,342.99, 20,013.80 and 3,983.08

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Solution

The fourth proportional to 13,342.99, 20,013.80 and 3,983.08 is: 5,974.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,342.99 : 20,013.80 = 3,983.08 : x
  2. Step 2: Convert to fraction form
    13,342.99/20,013.80 = 3,983.08/x
  3. Step 3: Cross multiply
    13,342.99x = 20,013.80 × 3,983.08
  4. Step 4: Simplify right side
    13,342.99x = 79,716,606.58
  5. Step 5: Solve for x
    x = 79,716,606.58/13,342.99
  6. Step 6: Final answer
    x = 5,974.42

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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.