Home / 20,421.59-30,636.62-6,381.05

Finding the Fourth Proportional to 20,421.59, 30,636.62 and 6,381.05

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Solution

The fourth proportional to 20,421.59, 30,636.62 and 6,381.05 is: 9,572.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.59 : 30,636.62 = 6,381.05 : x
  2. Step 2: Convert to fraction form
    20,421.59/30,636.62 = 6,381.05/x
  3. Step 3: Cross multiply
    20,421.59x = 30,636.62 × 6,381.05
  4. Step 4: Simplify right side
    20,421.59x = 195,493,618.96
  5. Step 5: Solve for x
    x = 195,493,618.96/20,421.59
  6. Step 6: Final answer
    x = 9,572.89

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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.