Home / 2,086.12-3,127.65-989.20

Finding the Fourth Proportional to 2,086.12, 3,127.65 and 989.20

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Solution

The fourth proportional to 2,086.12, 3,127.65 and 989.20 is: 1,483.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.12 : 3,127.65 = 989.20 : x
  2. Step 2: Convert to fraction form
    2,086.12/3,127.65 = 989.20/x
  3. Step 3: Cross multiply
    2,086.12x = 3,127.65 × 989.20
  4. Step 4: Simplify right side
    2,086.12x = 3,093,871.38
  5. Step 5: Solve for x
    x = 3,093,871.38/2,086.12
  6. Step 6: Final answer
    x = 1,483.07

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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.