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Finding the Fourth Proportional to 20,080.70, 30,121.05 and 16,435.70

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Solution

The fourth proportional to 20,080.70, 30,121.05 and 16,435.70 is: 24,653.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.70 : 30,121.05 = 16,435.70 : x
  2. Step 2: Convert to fraction form
    20,080.70/30,121.05 = 16,435.70/x
  3. Step 3: Cross multiply
    20,080.70x = 30,121.05 × 16,435.70
  4. Step 4: Simplify right side
    20,080.70x = 495,060,541.49
  5. Step 5: Solve for x
    x = 495,060,541.49/20,080.70
  6. Step 6: Final answer
    x = 24,653.55

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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.