Home / 12,071.10-18,107.55-4,278.90

Finding the Fourth Proportional to 12,071.10, 18,107.55 and 4,278.90

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Solution

The fourth proportional to 12,071.10, 18,107.55 and 4,278.90 is: 6,418.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,071.10 : 18,107.55 = 4,278.90 : x
  2. Step 2: Convert to fraction form
    12,071.10/18,107.55 = 4,278.90/x
  3. Step 3: Cross multiply
    12,071.10x = 18,107.55 × 4,278.90
  4. Step 4: Simplify right side
    12,071.10x = 77,480,395.70
  5. Step 5: Solve for x
    x = 77,480,395.70/12,071.10
  6. Step 6: Final answer
    x = 6,418.67

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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.