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Finding the Fourth Proportional to 20,460.65, 30,687.54 and 5,671.05

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Solution

The fourth proportional to 20,460.65, 30,687.54 and 5,671.05 is: 8,505.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.65 : 30,687.54 = 5,671.05 : x
  2. Step 2: Convert to fraction form
    20,460.65/30,687.54 = 5,671.05/x
  3. Step 3: Cross multiply
    20,460.65x = 30,687.54 × 5,671.05
  4. Step 4: Simplify right side
    20,460.65x = 174,030,573.72
  5. Step 5: Solve for x
    x = 174,030,573.72/20,460.65
  6. Step 6: Final answer
    x = 8,505.63

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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.