Home / 21,941.82-30,279.64-11,870.25

Finding the Fourth Proportional to 21,941.82, 30,279.64 and 11,870.25

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Solution

The fourth proportional to 21,941.82, 30,279.64 and 11,870.25 is: 16,380.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,941.82 : 30,279.64 = 11,870.25 : x
  2. Step 2: Convert to fraction form
    21,941.82/30,279.64 = 11,870.25/x
  3. Step 3: Cross multiply
    21,941.82x = 30,279.64 × 11,870.25
  4. Step 4: Simplify right side
    21,941.82x = 359,426,853.41
  5. Step 5: Solve for x
    x = 359,426,853.41/21,941.82
  6. Step 6: Final answer
    x = 16,380.91

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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.