Home / 2,126.60-3,189.78-1,087.01

Finding the Fourth Proportional to 2,126.60, 3,189.78 and 1,087.01

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Solution

The fourth proportional to 2,126.60, 3,189.78 and 1,087.01 is: 1,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.60 : 3,189.78 = 1,087.01 : x
  2. Step 2: Convert to fraction form
    2,126.60/3,189.78 = 1,087.01/x
  3. Step 3: Cross multiply
    2,126.60x = 3,189.78 × 1,087.01
  4. Step 4: Simplify right side
    2,126.60x = 3,467,322.76
  5. Step 5: Solve for x
    x = 3,467,322.76/2,126.60
  6. Step 6: Final answer
    x = 1,630.45

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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.