Home / 20,683.42-30,975.75-11,899.87

Finding the Fourth Proportional to 20,683.42, 30,975.75 and 11,899.87

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Solution

The fourth proportional to 20,683.42, 30,975.75 and 11,899.87 is: 17,821.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.42 : 30,975.75 = 11,899.87 : x
  2. Step 2: Convert to fraction form
    20,683.42/30,975.75 = 11,899.87/x
  3. Step 3: Cross multiply
    20,683.42x = 30,975.75 × 11,899.87
  4. Step 4: Simplify right side
    20,683.42x = 368,607,320.71
  5. Step 5: Solve for x
    x = 368,607,320.71/20,683.42
  6. Step 6: Final answer
    x = 17,821.39

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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.