Home / 20,109.70-30,176.31-8,421.94

Finding the Fourth Proportional to 20,109.70, 30,176.31 and 8,421.94

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Solution

The fourth proportional to 20,109.70, 30,176.31 and 8,421.94 is: 12,637.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.70 : 30,176.31 = 8,421.94 : x
  2. Step 2: Convert to fraction form
    20,109.70/30,176.31 = 8,421.94/x
  3. Step 3: Cross multiply
    20,109.70x = 30,176.31 × 8,421.94
  4. Step 4: Simplify right side
    20,109.70x = 254,143,072.24
  5. Step 5: Solve for x
    x = 254,143,072.24/20,109.70
  6. Step 6: Final answer
    x = 12,637.84

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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.