Home / 20,860.26-28,786.55-11,428.62

Finding the Fourth Proportional to 20,860.26, 28,786.55 and 11,428.62

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Solution

The fourth proportional to 20,860.26, 28,786.55 and 11,428.62 is: 15,771.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.26 : 28,786.55 = 11,428.62 : x
  2. Step 2: Convert to fraction form
    20,860.26/28,786.55 = 11,428.62/x
  3. Step 3: Cross multiply
    20,860.26x = 28,786.55 × 11,428.62
  4. Step 4: Simplify right side
    20,860.26x = 328,990,541.06
  5. Step 5: Solve for x
    x = 328,990,541.06/20,860.26
  6. Step 6: Final answer
    x = 15,771.16

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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.