Home / 12,742.11-19,103.93-6,420.89

Finding the Fourth Proportional to 12,742.11, 19,103.93 and 6,420.89

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Solution

The fourth proportional to 12,742.11, 19,103.93 and 6,420.89 is: 9,626.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.11 : 19,103.93 = 6,420.89 : x
  2. Step 2: Convert to fraction form
    12,742.11/19,103.93 = 6,420.89/x
  3. Step 3: Cross multiply
    12,742.11x = 19,103.93 × 6,420.89
  4. Step 4: Simplify right side
    12,742.11x = 122,664,105.47
  5. Step 5: Solve for x
    x = 122,664,105.47/12,742.11
  6. Step 6: Final answer
    x = 9,626.67

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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.