Home / 8,420.84-12,631.30-2,180.41

Finding the Fourth Proportional to 8,420.84, 12,631.30 and 2,180.41

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Solution

The fourth proportional to 8,420.84, 12,631.30 and 2,180.41 is: 3,270.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.84 : 12,631.30 = 2,180.41 : x
  2. Step 2: Convert to fraction form
    8,420.84/12,631.30 = 2,180.41/x
  3. Step 3: Cross multiply
    8,420.84x = 12,631.30 × 2,180.41
  4. Step 4: Simplify right side
    8,420.84x = 27,541,444.41
  5. Step 5: Solve for x
    x = 27,541,444.41/8,420.84
  6. Step 6: Final answer
    x = 3,270.63

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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.