Home / 20,578.05-28,396.04-12,079.26

Finding the Fourth Proportional to 20,578.05, 28,396.04 and 12,079.26

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Solution

The fourth proportional to 20,578.05, 28,396.04 and 12,079.26 is: 16,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.05 : 28,396.04 = 12,079.26 : x
  2. Step 2: Convert to fraction form
    20,578.05/28,396.04 = 12,079.26/x
  3. Step 3: Cross multiply
    20,578.05x = 28,396.04 × 12,079.26
  4. Step 4: Simplify right side
    20,578.05x = 343,003,089.73
  5. Step 5: Solve for x
    x = 343,003,089.73/20,578.05
  6. Step 6: Final answer
    x = 16,668.40

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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.