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Finding the Fourth Proportional to 38,930.40, 53,725.44 and 21,941.40

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Solution

The fourth proportional to 38,930.40, 53,725.44 and 21,941.40 is: 30,279.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,930.40 : 53,725.44 = 21,941.40 : x
  2. Step 2: Convert to fraction form
    38,930.40/53,725.44 = 21,941.40/x
  3. Step 3: Cross multiply
    38,930.40x = 53,725.44 × 21,941.40
  4. Step 4: Simplify right side
    38,930.40x = 1,178,811,369.22
  5. Step 5: Solve for x
    x = 1,178,811,369.22/38,930.40
  6. Step 6: Final answer
    x = 30,279.97

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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.