Home / 13,939.92-20,910.96-6,147.36

Finding the Fourth Proportional to 13,939.92, 20,910.96 and 6,147.36

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Solution

The fourth proportional to 13,939.92, 20,910.96 and 6,147.36 is: 9,221.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.92 : 20,910.96 = 6,147.36 : x
  2. Step 2: Convert to fraction form
    13,939.92/20,910.96 = 6,147.36/x
  3. Step 3: Cross multiply
    13,939.92x = 20,910.96 × 6,147.36
  4. Step 4: Simplify right side
    13,939.92x = 128,547,199.07
  5. Step 5: Solve for x
    x = 128,547,199.07/13,939.92
  6. Step 6: Final answer
    x = 9,221.52

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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.