Home / 20,402.88-30,613.68-12,099.36

Finding the Fourth Proportional to 20,402.88, 30,613.68 and 12,099.36

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Solution

The fourth proportional to 20,402.88, 30,613.68 and 12,099.36 is: 18,154.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.88 : 30,613.68 = 12,099.36 : x
  2. Step 2: Convert to fraction form
    20,402.88/30,613.68 = 12,099.36/x
  3. Step 3: Cross multiply
    20,402.88x = 30,613.68 × 12,099.36
  4. Step 4: Simplify right side
    20,402.88x = 370,405,935.24
  5. Step 5: Solve for x
    x = 370,405,935.24/20,402.88
  6. Step 6: Final answer
    x = 18,154.59

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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.