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Finding the Fourth Proportional to 21,702.30, 29,949.03 and 12,270.90

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Solution

The fourth proportional to 21,702.30, 29,949.03 and 12,270.90 is: 16,933.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.30 : 29,949.03 = 12,270.90 : x
  2. Step 2: Convert to fraction form
    21,702.30/29,949.03 = 12,270.90/x
  3. Step 3: Cross multiply
    21,702.30x = 29,949.03 × 12,270.90
  4. Step 4: Simplify right side
    21,702.30x = 367,501,552.23
  5. Step 5: Solve for x
    x = 367,501,552.23/21,702.30
  6. Step 6: Final answer
    x = 16,933.76

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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.