Home / 18,983.60-28,478.70-7,884.20

Finding the Fourth Proportional to 18,983.60, 28,478.70 and 7,884.20

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Solution

The fourth proportional to 18,983.60, 28,478.70 and 7,884.20 is: 11,827.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.60 : 28,478.70 = 7,884.20 : x
  2. Step 2: Convert to fraction form
    18,983.60/28,478.70 = 7,884.20/x
  3. Step 3: Cross multiply
    18,983.60x = 28,478.70 × 7,884.20
  4. Step 4: Simplify right side
    18,983.60x = 224,531,766.54
  5. Step 5: Solve for x
    x = 224,531,766.54/18,983.60
  6. Step 6: Final answer
    x = 11,827.67

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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.