Home / 18,731.76-28,099.80-6,889.20

Finding the Fourth Proportional to 18,731.76, 28,099.80 and 6,889.20

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Solution

The fourth proportional to 18,731.76, 28,099.80 and 6,889.20 is: 10,334.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.76 : 28,099.80 = 6,889.20 : x
  2. Step 2: Convert to fraction form
    18,731.76/28,099.80 = 6,889.20/x
  3. Step 3: Cross multiply
    18,731.76x = 28,099.80 × 6,889.20
  4. Step 4: Simplify right side
    18,731.76x = 193,585,142.16
  5. Step 5: Solve for x
    x = 193,585,142.16/18,731.76
  6. Step 6: Final answer
    x = 10,334.59

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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.