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Finding the Fourth Proportional to 6,638.88, 9,955.50 and 2,938.50

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Solution

The fourth proportional to 6,638.88, 9,955.50 and 2,938.50 is: 4,406.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.88 : 9,955.50 = 2,938.50 : x
  2. Step 2: Convert to fraction form
    6,638.88/9,955.50 = 2,938.50/x
  3. Step 3: Cross multiply
    6,638.88x = 9,955.50 × 2,938.50
  4. Step 4: Simplify right side
    6,638.88x = 29,254,236.75
  5. Step 5: Solve for x
    x = 29,254,236.75/6,638.88
  6. Step 6: Final answer
    x = 4,406.50

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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.