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Finding the Fourth Proportional to 28,045, 38,702.18 and 15,469.64

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Solution

The fourth proportional to 28,045, 38,702.18 and 15,469.64 is: 21,348.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,045 : 38,702.18 = 15,469.64 : x
  2. Step 2: Convert to fraction form
    28,045/38,702.18 = 15,469.64/x
  3. Step 3: Cross multiply
    28,045x = 38,702.18 × 15,469.64
  4. Step 4: Simplify right side
    28,045x = 598,708,791.82
  5. Step 5: Solve for x
    x = 598,708,791.82/28,045
  6. Step 6: Final answer
    x = 21,348.15

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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.