Home / 12,628.90-18,948.81-6,778.67

Finding the Fourth Proportional to 12,628.90, 18,948.81 and 6,778.67

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Solution

The fourth proportional to 12,628.90, 18,948.81 and 6,778.67 is: 10,170.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.90 : 18,948.81 = 6,778.67 : x
  2. Step 2: Convert to fraction form
    12,628.90/18,948.81 = 6,778.67/x
  3. Step 3: Cross multiply
    12,628.90x = 18,948.81 × 6,778.67
  4. Step 4: Simplify right side
    12,628.90x = 128,447,729.88
  5. Step 5: Solve for x
    x = 128,447,729.88/12,628.90
  6. Step 6: Final answer
    x = 10,170.94

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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.