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Finding the Fourth Proportional to 21,702.75, 29,896.22 and 18,505.64

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Solution

The fourth proportional to 21,702.75, 29,896.22 and 18,505.64 is: 25,492.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.75 : 29,896.22 = 18,505.64 : x
  2. Step 2: Convert to fraction form
    21,702.75/29,896.22 = 18,505.64/x
  3. Step 3: Cross multiply
    21,702.75x = 29,896.22 × 18,505.64
  4. Step 4: Simplify right side
    21,702.75x = 553,248,442.67
  5. Step 5: Solve for x
    x = 553,248,442.67/21,702.75
  6. Step 6: Final answer
    x = 25,492.09

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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.