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Finding the Fourth Proportional to 6,671.13, 10,003.20 and 1,990.50

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Solution

The fourth proportional to 6,671.13, 10,003.20 and 1,990.50 is: 2,984.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,671.13 : 10,003.20 = 1,990.50 : x
  2. Step 2: Convert to fraction form
    6,671.13/10,003.20 = 1,990.50/x
  3. Step 3: Cross multiply
    6,671.13x = 10,003.20 × 1,990.50
  4. Step 4: Simplify right side
    6,671.13x = 19,911,369.60
  5. Step 5: Solve for x
    x = 19,911,369.60/6,671.13
  6. Step 6: Final answer
    x = 2,984.71

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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.