Home / 20,412.55-30,613.04-7,929.91

Finding the Fourth Proportional to 20,412.55, 30,613.04 and 7,929.91

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Solution

The fourth proportional to 20,412.55, 30,613.04 and 7,929.91 is: 11,892.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.55 : 30,613.04 = 7,929.91 : x
  2. Step 2: Convert to fraction form
    20,412.55/30,613.04 = 7,929.91/x
  3. Step 3: Cross multiply
    20,412.55x = 30,613.04 × 7,929.91
  4. Step 4: Simplify right side
    20,412.55x = 242,758,652.03
  5. Step 5: Solve for x
    x = 242,758,652.03/20,412.55
  6. Step 6: Final answer
    x = 11,892.62

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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.