Home / 12,139.18-18,211.36-6,876.67

Finding the Fourth Proportional to 12,139.18, 18,211.36 and 6,876.67

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Solution

The fourth proportional to 12,139.18, 18,211.36 and 6,876.67 is: 10,316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.18 : 18,211.36 = 6,876.67 : x
  2. Step 2: Convert to fraction form
    12,139.18/18,211.36 = 6,876.67/x
  3. Step 3: Cross multiply
    12,139.18x = 18,211.36 × 6,876.67
  4. Step 4: Simplify right side
    12,139.18x = 125,233,512.97
  5. Step 5: Solve for x
    x = 125,233,512.97/12,139.18
  6. Step 6: Final answer
    x = 10,316.47

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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.