Home / 20,685.49-31,039.88-11,197.56

Finding the Fourth Proportional to 20,685.49, 31,039.88 and 11,197.56

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Solution

The fourth proportional to 20,685.49, 31,039.88 and 11,197.56 is: 16,802.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.49 : 31,039.88 = 11,197.56 : x
  2. Step 2: Convert to fraction form
    20,685.49/31,039.88 = 11,197.56/x
  3. Step 3: Cross multiply
    20,685.49x = 31,039.88 × 11,197.56
  4. Step 4: Simplify right side
    20,685.49x = 347,570,918.69
  5. Step 5: Solve for x
    x = 347,570,918.69/20,685.49
  6. Step 6: Final answer
    x = 16,802.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.