Home / 20,087.20-30,145.20-11,312.80

Finding the Fourth Proportional to 20,087.20, 30,145.20 and 11,312.80

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Solution

The fourth proportional to 20,087.20, 30,145.20 and 11,312.80 is: 16,977.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.20 : 30,145.20 = 11,312.80 : x
  2. Step 2: Convert to fraction form
    20,087.20/30,145.20 = 11,312.80/x
  3. Step 3: Cross multiply
    20,087.20x = 30,145.20 × 11,312.80
  4. Step 4: Simplify right side
    20,087.20x = 341,026,618.56
  5. Step 5: Solve for x
    x = 341,026,618.56/20,087.20
  6. Step 6: Final answer
    x = 16,977.31

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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.