Home / 20,889.24-31,346.30-8,410.40

Finding the Fourth Proportional to 20,889.24, 31,346.30 and 8,410.40

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Solution

The fourth proportional to 20,889.24, 31,346.30 and 8,410.40 is: 12,620.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.24 : 31,346.30 = 8,410.40 : x
  2. Step 2: Convert to fraction form
    20,889.24/31,346.30 = 8,410.40/x
  3. Step 3: Cross multiply
    20,889.24x = 31,346.30 × 8,410.40
  4. Step 4: Simplify right side
    20,889.24x = 263,634,921.52
  5. Step 5: Solve for x
    x = 263,634,921.52/20,889.24
  6. Step 6: Final answer
    x = 12,620.61

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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.