Home / 5,109.06-7,664.50-1,990.76

Finding the Fourth Proportional to 5,109.06, 7,664.50 and 1,990.76

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Solution

The fourth proportional to 5,109.06, 7,664.50 and 1,990.76 is: 2,986.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.06 : 7,664.50 = 1,990.76 : x
  2. Step 2: Convert to fraction form
    5,109.06/7,664.50 = 1,990.76/x
  3. Step 3: Cross multiply
    5,109.06x = 7,664.50 × 1,990.76
  4. Step 4: Simplify right side
    5,109.06x = 15,258,170.07
  5. Step 5: Solve for x
    x = 15,258,170.07/5,109.06
  6. Step 6: Final answer
    x = 2,986.50

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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.