Home / 13,920.66-20,889.09-5,601.42

Finding the Fourth Proportional to 13,920.66, 20,889.09 and 5,601.42

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Solution

The fourth proportional to 13,920.66, 20,889.09 and 5,601.42 is: 8,405.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.66 : 20,889.09 = 5,601.42 : x
  2. Step 2: Convert to fraction form
    13,920.66/20,889.09 = 5,601.42/x
  3. Step 3: Cross multiply
    13,920.66x = 20,889.09 × 5,601.42
  4. Step 4: Simplify right side
    13,920.66x = 117,008,566.51
  5. Step 5: Solve for x
    x = 117,008,566.51/13,920.66
  6. Step 6: Final answer
    x = 8,405.39

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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.