Home / 18,961.60-28,445.70-7,862.20

Finding the Fourth Proportional to 18,961.60, 28,445.70 and 7,862.20

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Solution

The fourth proportional to 18,961.60, 28,445.70 and 7,862.20 is: 11,794.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.60 : 28,445.70 = 7,862.20 : x
  2. Step 2: Convert to fraction form
    18,961.60/28,445.70 = 7,862.20/x
  3. Step 3: Cross multiply
    18,961.60x = 28,445.70 × 7,862.20
  4. Step 4: Simplify right side
    18,961.60x = 223,645,782.54
  5. Step 5: Solve for x
    x = 223,645,782.54/18,961.60
  6. Step 6: Final answer
    x = 11,794.67

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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.