Home / 20,271.12-27,975.38-11,318.60

Finding the Fourth Proportional to 20,271.12, 27,975.38 and 11,318.60

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Solution

The fourth proportional to 20,271.12, 27,975.38 and 11,318.60 is: 15,620.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.12 : 27,975.38 = 11,318.60 : x
  2. Step 2: Convert to fraction form
    20,271.12/27,975.38 = 11,318.60/x
  3. Step 3: Cross multiply
    20,271.12x = 27,975.38 × 11,318.60
  4. Step 4: Simplify right side
    20,271.12x = 316,642,136.07
  5. Step 5: Solve for x
    x = 316,642,136.07/20,271.12
  6. Step 6: Final answer
    x = 15,620.36

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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.