Home / 12,278.85-18,420.13-6,271.63

Finding the Fourth Proportional to 12,278.85, 18,420.13 and 6,271.63

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Solution

The fourth proportional to 12,278.85, 18,420.13 and 6,271.63 is: 9,408.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.85 : 18,420.13 = 6,271.63 : x
  2. Step 2: Convert to fraction form
    12,278.85/18,420.13 = 6,271.63/x
  3. Step 3: Cross multiply
    12,278.85x = 18,420.13 × 6,271.63
  4. Step 4: Simplify right side
    12,278.85x = 115,524,201.70
  5. Step 5: Solve for x
    x = 115,524,201.70/12,278.85
  6. Step 6: Final answer
    x = 9,408.39

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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.