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Finding the Fourth Proportional to 38,889.90, 53,668.26 and 22,122.90

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Solution

The fourth proportional to 38,889.90, 53,668.26 and 22,122.90 is: 30,529.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,889.90 : 53,668.26 = 22,122.90 : x
  2. Step 2: Convert to fraction form
    38,889.90/53,668.26 = 22,122.90/x
  3. Step 3: Cross multiply
    38,889.90x = 53,668.26 × 22,122.90
  4. Step 4: Simplify right side
    38,889.90x = 1,187,297,549.15
  5. Step 5: Solve for x
    x = 1,187,297,549.15/38,889.90
  6. Step 6: Final answer
    x = 30,529.71

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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.