Home / 6,261.20-8,640.40-3,428.50

Finding the Fourth Proportional to 6,261.20, 8,640.40 and 3,428.50

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Solution

The fourth proportional to 6,261.20, 8,640.40 and 3,428.50 is: 4,731.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,261.20 : 8,640.40 = 3,428.50 : x
  2. Step 2: Convert to fraction form
    6,261.20/8,640.40 = 3,428.50/x
  3. Step 3: Cross multiply
    6,261.20x = 8,640.40 × 3,428.50
  4. Step 4: Simplify right side
    6,261.20x = 29,623,611.40
  5. Step 5: Solve for x
    x = 29,623,611.40/6,261.20
  6. Step 6: Final answer
    x = 4,731.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.