Home / 21,939.85-30,276.96-11,868.26

Finding the Fourth Proportional to 21,939.85, 30,276.96 and 11,868.26

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Solution

The fourth proportional to 21,939.85, 30,276.96 and 11,868.26 is: 16,378.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.85 : 30,276.96 = 11,868.26 : x
  2. Step 2: Convert to fraction form
    21,939.85/30,276.96 = 11,868.26/x
  3. Step 3: Cross multiply
    21,939.85x = 30,276.96 × 11,868.26
  4. Step 4: Simplify right side
    21,939.85x = 359,334,993.00
  5. Step 5: Solve for x
    x = 359,334,993.00/21,939.85
  6. Step 6: Final answer
    x = 16,378.19

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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.