Home / 12,128.13-18,172.05-4,226.46

Finding the Fourth Proportional to 12,128.13, 18,172.05 and 4,226.46

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Solution

The fourth proportional to 12,128.13, 18,172.05 and 4,226.46 is: 6,332.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.13 : 18,172.05 = 4,226.46 : x
  2. Step 2: Convert to fraction form
    12,128.13/18,172.05 = 4,226.46/x
  3. Step 3: Cross multiply
    12,128.13x = 18,172.05 × 4,226.46
  4. Step 4: Simplify right side
    12,128.13x = 76,803,442.44
  5. Step 5: Solve for x
    x = 76,803,442.44/12,128.13
  6. Step 6: Final answer
    x = 6,332.67

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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.