Home / 12,620.22-18,930.40-5,220.67

Finding the Fourth Proportional to 12,620.22, 18,930.40 and 5,220.67

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Solution

The fourth proportional to 12,620.22, 18,930.40 and 5,220.67 is: 7,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.22 : 18,930.40 = 5,220.67 : x
  2. Step 2: Convert to fraction form
    12,620.22/18,930.40 = 5,220.67/x
  3. Step 3: Cross multiply
    12,620.22x = 18,930.40 × 5,220.67
  4. Step 4: Simplify right side
    12,620.22x = 98,829,371.37
  5. Step 5: Solve for x
    x = 98,829,371.37/12,620.22
  6. Step 6: Final answer
    x = 7,831.03

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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.