Home / 15,744.39-21,728.49-8,672.07

Finding the Fourth Proportional to 15,744.39, 21,728.49 and 8,672.07

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Solution

The fourth proportional to 15,744.39, 21,728.49 and 8,672.07 is: 11,968.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.39 : 21,728.49 = 8,672.07 : x
  2. Step 2: Convert to fraction form
    15,744.39/21,728.49 = 8,672.07/x
  3. Step 3: Cross multiply
    15,744.39x = 21,728.49 × 8,672.07
  4. Step 4: Simplify right side
    15,744.39x = 188,430,986.27
  5. Step 5: Solve for x
    x = 188,430,986.27/15,744.39
  6. Step 6: Final answer
    x = 11,968.14

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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.