Home / 12,279.21-18,420.65-4,381.11

Finding the Fourth Proportional to 12,279.21, 18,420.65 and 4,381.11

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Solution

The fourth proportional to 12,279.21, 18,420.65 and 4,381.11 is: 6,572.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.21 : 18,420.65 = 4,381.11 : x
  2. Step 2: Convert to fraction form
    12,279.21/18,420.65 = 4,381.11/x
  3. Step 3: Cross multiply
    12,279.21x = 18,420.65 × 4,381.11
  4. Step 4: Simplify right side
    12,279.21x = 80,702,872.02
  5. Step 5: Solve for x
    x = 80,702,872.02/12,279.21
  6. Step 6: Final answer
    x = 6,572.32

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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.