Home / 20,395.69-28,146.25-11,321.16

Finding the Fourth Proportional to 20,395.69, 28,146.25 and 11,321.16

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Solution

The fourth proportional to 20,395.69, 28,146.25 and 11,321.16 is: 15,623.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.69 : 28,146.25 = 11,321.16 : x
  2. Step 2: Convert to fraction form
    20,395.69/28,146.25 = 11,321.16/x
  3. Step 3: Cross multiply
    20,395.69x = 28,146.25 × 11,321.16
  4. Step 4: Simplify right side
    20,395.69x = 318,648,199.65
  5. Step 5: Solve for x
    x = 318,648,199.65/20,395.69
  6. Step 6: Final answer
    x = 15,623.31

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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.