Home / 21,941.78-30,279.62-11,870.23

Finding the Fourth Proportional to 21,941.78, 30,279.62 and 11,870.23

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Solution

The fourth proportional to 21,941.78, 30,279.62 and 11,870.23 is: 16,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,941.78 : 30,279.62 = 11,870.23 : x
  2. Step 2: Convert to fraction form
    21,941.78/30,279.62 = 11,870.23/x
  3. Step 3: Cross multiply
    21,941.78x = 30,279.62 × 11,870.23
  4. Step 4: Simplify right side
    21,941.78x = 359,425,994.36
  5. Step 5: Solve for x
    x = 359,425,994.36/21,941.78
  6. Step 6: Final answer
    x = 16,380.90

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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.