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Finding the Fourth Proportional to 15,859.91, 21,889.01 and 9,144.23

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Solution

The fourth proportional to 15,859.91, 21,889.01 and 9,144.23 is: 12,620.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,859.91 : 21,889.01 = 9,144.23 : x
  2. Step 2: Convert to fraction form
    15,859.91/21,889.01 = 9,144.23/x
  3. Step 3: Cross multiply
    15,859.91x = 21,889.01 × 9,144.23
  4. Step 4: Simplify right side
    15,859.91x = 200,157,986.75
  5. Step 5: Solve for x
    x = 200,157,986.75/15,859.91
  6. Step 6: Final answer
    x = 12,620.38

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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.