Home / 3,638.70-5,456.25-1,689.66

Finding the Fourth Proportional to 3,638.70, 5,456.25 and 1,689.66

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Solution

The fourth proportional to 3,638.70, 5,456.25 and 1,689.66 is: 2,533.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.70 : 5,456.25 = 1,689.66 : x
  2. Step 2: Convert to fraction form
    3,638.70/5,456.25 = 1,689.66/x
  3. Step 3: Cross multiply
    3,638.70x = 5,456.25 × 1,689.66
  4. Step 4: Simplify right side
    3,638.70x = 9,219,207.38
  5. Step 5: Solve for x
    x = 9,219,207.38/3,638.70
  6. Step 6: Final answer
    x = 2,533.65

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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.