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Finding the Fourth Proportional to 30,391.48, 41,939.82 and 17,817.40

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Solution

The fourth proportional to 30,391.48, 41,939.82 and 17,817.40 is: 24,587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,391.48 : 41,939.82 = 17,817.40 : x
  2. Step 2: Convert to fraction form
    30,391.48/41,939.82 = 17,817.40/x
  3. Step 3: Cross multiply
    30,391.48x = 41,939.82 × 17,817.40
  4. Step 4: Simplify right side
    30,391.48x = 747,258,548.87
  5. Step 5: Solve for x
    x = 747,258,548.87/30,391.48
  6. Step 6: Final answer
    x = 24,587.76

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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.