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Finding the Fourth Proportional to 12,672.12, 19,008.30 and 4,879.80

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Solution

The fourth proportional to 12,672.12, 19,008.30 and 4,879.80 is: 7,319.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.12 : 19,008.30 = 4,879.80 : x
  2. Step 2: Convert to fraction form
    12,672.12/19,008.30 = 4,879.80/x
  3. Step 3: Cross multiply
    12,672.12x = 19,008.30 × 4,879.80
  4. Step 4: Simplify right side
    12,672.12x = 92,756,702.34
  5. Step 5: Solve for x
    x = 92,756,702.34/12,672.12
  6. Step 6: Final answer
    x = 7,319.75

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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.