Home / 20,001.20-30,001.80-16,830.05

Finding the Fourth Proportional to 20,001.20, 30,001.80 and 16,830.05

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Solution

The fourth proportional to 20,001.20, 30,001.80 and 16,830.05 is: 25,245.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,001.20 : 30,001.80 = 16,830.05 : x
  2. Step 2: Convert to fraction form
    20,001.20/30,001.80 = 16,830.05/x
  3. Step 3: Cross multiply
    20,001.20x = 30,001.80 × 16,830.05
  4. Step 4: Simplify right side
    20,001.20x = 504,931,794.09
  5. Step 5: Solve for x
    x = 504,931,794.09/20,001.20
  6. Step 6: Final answer
    x = 25,245.08

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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.