Home / 13,939.29-19,239.91-8,631.09

Finding the Fourth Proportional to 13,939.29, 19,239.91 and 8,631.09

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Solution

The fourth proportional to 13,939.29, 19,239.91 and 8,631.09 is: 11,913.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.29 : 19,239.91 = 8,631.09 : x
  2. Step 2: Convert to fraction form
    13,939.29/19,239.91 = 8,631.09/x
  3. Step 3: Cross multiply
    13,939.29x = 19,239.91 × 8,631.09
  4. Step 4: Simplify right side
    13,939.29x = 166,061,373.22
  5. Step 5: Solve for x
    x = 166,061,373.22/13,939.29
  6. Step 6: Final answer
    x = 11,913.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.