Home / 39,806.10-54,930.42-21,900.63

Finding the Fourth Proportional to 39,806.10, 54,930.42 and 21,900.63

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Solution

The fourth proportional to 39,806.10, 54,930.42 and 21,900.63 is: 30,221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,806.10 : 54,930.42 = 21,900.63 : x
  2. Step 2: Convert to fraction form
    39,806.10/54,930.42 = 21,900.63/x
  3. Step 3: Cross multiply
    39,806.10x = 54,930.42 × 21,900.63
  4. Step 4: Simplify right side
    39,806.10x = 1,203,010,804.16
  5. Step 5: Solve for x
    x = 1,203,010,804.16/39,806.10
  6. Step 6: Final answer
    x = 30,221.77

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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.