Home / 13,929.20-19,231.80-9,738.80

Finding the Fourth Proportional to 13,929.20, 19,231.80 and 9,738.80

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Solution

The fourth proportional to 13,929.20, 19,231.80 and 9,738.80 is: 13,446.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.20 : 19,231.80 = 9,738.80 : x
  2. Step 2: Convert to fraction form
    13,929.20/19,231.80 = 9,738.80/x
  3. Step 3: Cross multiply
    13,929.20x = 19,231.80 × 9,738.80
  4. Step 4: Simplify right side
    13,929.20x = 187,294,653.84
  5. Step 5: Solve for x
    x = 187,294,653.84/13,929.20
  6. Step 6: Final answer
    x = 13,446.19

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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.