Home / 20,121.90-30,182.85-19,268.70

Finding the Fourth Proportional to 20,121.90, 30,182.85 and 19,268.70

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Solution

The fourth proportional to 20,121.90, 30,182.85 and 19,268.70 is: 28,903.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.90 : 30,182.85 = 19,268.70 : x
  2. Step 2: Convert to fraction form
    20,121.90/30,182.85 = 19,268.70/x
  3. Step 3: Cross multiply
    20,121.90x = 30,182.85 × 19,268.70
  4. Step 4: Simplify right side
    20,121.90x = 581,584,281.80
  5. Step 5: Solve for x
    x = 581,584,281.80/20,121.90
  6. Step 6: Final answer
    x = 28,903.05

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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.