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Finding the Fourth Proportional to 20,133.70, 28,245.50 and 20,133.70

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Solution

The fourth proportional to 20,133.70, 28,245.50 and 20,133.70 is: 28,245.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.70 : 28,245.50 = 20,133.70 : x
  2. Step 2: Convert to fraction form
    20,133.70/28,245.50 = 20,133.70/x
  3. Step 3: Cross multiply
    20,133.70x = 28,245.50 × 20,133.70
  4. Step 4: Simplify right side
    20,133.70x = 568,686,423.35
  5. Step 5: Solve for x
    x = 568,686,423.35/20,133.70
  6. Step 6: Final answer
    x = 28,245.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.