Home / 2,125.76-3,189.60-1,085.12

Finding the Fourth Proportional to 2,125.76, 3,189.60 and 1,085.12

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Solution

The fourth proportional to 2,125.76, 3,189.60 and 1,085.12 is: 1,628.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.76 : 3,189.60 = 1,085.12 : x
  2. Step 2: Convert to fraction form
    2,125.76/3,189.60 = 1,085.12/x
  3. Step 3: Cross multiply
    2,125.76x = 3,189.60 × 1,085.12
  4. Step 4: Simplify right side
    2,125.76x = 3,461,098.75
  5. Step 5: Solve for x
    x = 3,461,098.75/2,125.76
  6. Step 6: Final answer
    x = 1,628.17

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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.