Home / 12,012.49-18,018.33-5,438.67

Finding the Fourth Proportional to 12,012.49, 18,018.33 and 5,438.67

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Solution

The fourth proportional to 12,012.49, 18,018.33 and 5,438.67 is: 8,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,012.49 : 18,018.33 = 5,438.67 : x
  2. Step 2: Convert to fraction form
    12,012.49/18,018.33 = 5,438.67/x
  3. Step 3: Cross multiply
    12,012.49x = 18,018.33 × 5,438.67
  4. Step 4: Simplify right side
    12,012.49x = 97,995,750.82
  5. Step 5: Solve for x
    x = 97,995,750.82/12,012.49
  6. Step 6: Final answer
    x = 8,157.82

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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.