Home / 21,940.70-30,276.14-13,438.94

Finding the Fourth Proportional to 21,940.70, 30,276.14 and 13,438.94

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Solution

The fourth proportional to 21,940.70, 30,276.14 and 13,438.94 is: 18,544.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.70 : 30,276.14 = 13,438.94 : x
  2. Step 2: Convert to fraction form
    21,940.70/30,276.14 = 13,438.94/x
  3. Step 3: Cross multiply
    21,940.70x = 30,276.14 × 13,438.94
  4. Step 4: Simplify right side
    21,940.70x = 406,879,228.89
  5. Step 5: Solve for x
    x = 406,879,228.89/21,940.70
  6. Step 6: Final answer
    x = 18,544.50

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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.