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Finding the Fourth Proportional to 12,702.60, 18,999.90 and 11,395.80

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Solution

The fourth proportional to 12,702.60, 18,999.90 and 11,395.80 is: 17,045.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,702.60 : 18,999.90 = 11,395.80 : x
  2. Step 2: Convert to fraction form
    12,702.60/18,999.90 = 11,395.80/x
  3. Step 3: Cross multiply
    12,702.60x = 18,999.90 × 11,395.80
  4. Step 4: Simplify right side
    12,702.60x = 216,519,060.42
  5. Step 5: Solve for x
    x = 216,519,060.42/12,702.60
  6. Step 6: Final answer
    x = 17,045.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.