Home / 20,412.18-28,169.10-12,028.68

Finding the Fourth Proportional to 20,412.18, 28,169.10 and 12,028.68

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Solution

The fourth proportional to 20,412.18, 28,169.10 and 12,028.68 is: 16,599.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.18 : 28,169.10 = 12,028.68 : x
  2. Step 2: Convert to fraction form
    20,412.18/28,169.10 = 12,028.68/x
  3. Step 3: Cross multiply
    20,412.18x = 28,169.10 × 12,028.68
  4. Step 4: Simplify right side
    20,412.18x = 338,837,089.79
  5. Step 5: Solve for x
    x = 338,837,089.79/20,412.18
  6. Step 6: Final answer
    x = 16,599.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.