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Finding the Fourth Proportional to 21,738.46, 29,883.65 and 18,702.46

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Solution

The fourth proportional to 21,738.46, 29,883.65 and 18,702.46 is: 25,710.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.46 : 29,883.65 = 18,702.46 : x
  2. Step 2: Convert to fraction form
    21,738.46/29,883.65 = 18,702.46/x
  3. Step 3: Cross multiply
    21,738.46x = 29,883.65 × 18,702.46
  4. Step 4: Simplify right side
    21,738.46x = 558,897,768.78
  5. Step 5: Solve for x
    x = 558,897,768.78/21,738.46
  6. Step 6: Final answer
    x = 25,710.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.