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Finding the Fourth Proportional to 23,139.20, 34,651.20 and 18,531.20

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Solution

The fourth proportional to 23,139.20, 34,651.20 and 18,531.20 is: 27,750.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,139.20 : 34,651.20 = 18,531.20 : x
  2. Step 2: Convert to fraction form
    23,139.20/34,651.20 = 18,531.20/x
  3. Step 3: Cross multiply
    23,139.20x = 34,651.20 × 18,531.20
  4. Step 4: Simplify right side
    23,139.20x = 642,128,317.44
  5. Step 5: Solve for x
    x = 642,128,317.44/23,139.20
  6. Step 6: Final answer
    x = 27,750.67

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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.