Home / 2,125.12-3,185.93-938.32

Finding the Fourth Proportional to 2,125.12, 3,185.93 and 938.32

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Solution

The fourth proportional to 2,125.12, 3,185.93 and 938.32 is: 1,406.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.12 : 3,185.93 = 938.32 : x
  2. Step 2: Convert to fraction form
    2,125.12/3,185.93 = 938.32/x
  3. Step 3: Cross multiply
    2,125.12x = 3,185.93 × 938.32
  4. Step 4: Simplify right side
    2,125.12x = 2,989,404.97
  5. Step 5: Solve for x
    x = 2,989,404.97/2,125.12
  6. Step 6: Final answer
    x = 1,406.70

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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.