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Finding the Fourth Proportional to 30,114.78, 45,128.88 and 16,939.32

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Solution

The fourth proportional to 30,114.78, 45,128.88 and 16,939.32 is: 25,384.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,114.78 : 45,128.88 = 16,939.32 : x
  2. Step 2: Convert to fraction form
    30,114.78/45,128.88 = 16,939.32/x
  3. Step 3: Cross multiply
    30,114.78x = 45,128.88 × 16,939.32
  4. Step 4: Simplify right side
    30,114.78x = 764,452,539.56
  5. Step 5: Solve for x
    x = 764,452,539.56/30,114.78
  6. Step 6: Final answer
    x = 25,384.63

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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.