Home / 21,942.12-30,280.09-11,870.57

Finding the Fourth Proportional to 21,942.12, 30,280.09 and 11,870.57

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Solution

The fourth proportional to 21,942.12, 30,280.09 and 11,870.57 is: 16,381.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.12 : 30,280.09 = 11,870.57 : x
  2. Step 2: Convert to fraction form
    21,942.12/30,280.09 = 11,870.57/x
  3. Step 3: Cross multiply
    21,942.12x = 30,280.09 × 11,870.57
  4. Step 4: Simplify right side
    21,942.12x = 359,441,996.23
  5. Step 5: Solve for x
    x = 359,441,996.23/21,942.12
  6. Step 6: Final answer
    x = 16,381.37

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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.