Home / 12,675.10-17,489.75-7,638.30

Finding the Fourth Proportional to 12,675.10, 17,489.75 and 7,638.30

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Solution

The fourth proportional to 12,675.10, 17,489.75 and 7,638.30 is: 10,539.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,675.10 : 17,489.75 = 7,638.30 : x
  2. Step 2: Convert to fraction form
    12,675.10/17,489.75 = 7,638.30/x
  3. Step 3: Cross multiply
    12,675.10x = 17,489.75 × 7,638.30
  4. Step 4: Simplify right side
    12,675.10x = 133,591,957.43
  5. Step 5: Solve for x
    x = 133,591,957.43/12,675.10
  6. Step 6: Final answer
    x = 10,539.72

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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.