Home / 12,679.50-19,018.89-5,657.70

Finding the Fourth Proportional to 12,679.50, 19,018.89 and 5,657.70

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Solution

The fourth proportional to 12,679.50, 19,018.89 and 5,657.70 is: 8,486.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.50 : 19,018.89 = 5,657.70 : x
  2. Step 2: Convert to fraction form
    12,679.50/19,018.89 = 5,657.70/x
  3. Step 3: Cross multiply
    12,679.50x = 19,018.89 × 5,657.70
  4. Step 4: Simplify right side
    12,679.50x = 107,603,173.95
  5. Step 5: Solve for x
    x = 107,603,173.95/12,679.50
  6. Step 6: Final answer
    x = 8,486.39

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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.