Home / 13,930.06-20,876.14-7,680.72

Finding the Fourth Proportional to 13,930.06, 20,876.14 and 7,680.72

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Solution

The fourth proportional to 13,930.06, 20,876.14 and 7,680.72 is: 11,510.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.06 : 20,876.14 = 7,680.72 : x
  2. Step 2: Convert to fraction form
    13,930.06/20,876.14 = 7,680.72/x
  3. Step 3: Cross multiply
    13,930.06x = 20,876.14 × 7,680.72
  4. Step 4: Simplify right side
    13,930.06x = 160,343,786.02
  5. Step 5: Solve for x
    x = 160,343,786.02/13,930.06
  6. Step 6: Final answer
    x = 11,510.63

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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.