Home / 28,668.11-39,563.31-15,921.35

Finding the Fourth Proportional to 28,668.11, 39,563.31 and 15,921.35

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Solution

The fourth proportional to 28,668.11, 39,563.31 and 15,921.35 is: 21,972.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,668.11 : 39,563.31 = 15,921.35 : x
  2. Step 2: Convert to fraction form
    28,668.11/39,563.31 = 15,921.35/x
  3. Step 3: Cross multiply
    28,668.11x = 39,563.31 × 15,921.35
  4. Step 4: Simplify right side
    28,668.11x = 629,901,215.50
  5. Step 5: Solve for x
    x = 629,901,215.50/28,668.11
  6. Step 6: Final answer
    x = 21,972.19

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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.