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Finding the Fourth Proportional to 20,505.94, 30,747.96 and 10,620.70

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Solution

The fourth proportional to 20,505.94, 30,747.96 and 10,620.70 is: 15,925.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.94 : 30,747.96 = 10,620.70 : x
  2. Step 2: Convert to fraction form
    20,505.94/30,747.96 = 10,620.70/x
  3. Step 3: Cross multiply
    20,505.94x = 30,747.96 × 10,620.70
  4. Step 4: Simplify right side
    20,505.94x = 326,564,858.77
  5. Step 5: Solve for x
    x = 326,564,858.77/20,505.94
  6. Step 6: Final answer
    x = 15,925.38

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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.