Home / 20,998.30-31,498.58-8,516.46

Finding the Fourth Proportional to 20,998.30, 31,498.58 and 8,516.46

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Solution

The fourth proportional to 20,998.30, 31,498.58 and 8,516.46 is: 12,775.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.30 : 31,498.58 = 8,516.46 : x
  2. Step 2: Convert to fraction form
    20,998.30/31,498.58 = 8,516.46/x
  3. Step 3: Cross multiply
    20,998.30x = 31,498.58 × 8,516.46
  4. Step 4: Simplify right side
    20,998.30x = 268,256,396.63
  5. Step 5: Solve for x
    x = 268,256,396.63/20,998.30
  6. Step 6: Final answer
    x = 12,775.15

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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.