Home / 1,989.04-2,736.84-1,938.16

Finding the Fourth Proportional to 1,989.04, 2,736.84 and 1,938.16

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Solution

The fourth proportional to 1,989.04, 2,736.84 and 1,938.16 is: 2,666.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.04 : 2,736.84 = 1,938.16 : x
  2. Step 2: Convert to fraction form
    1,989.04/2,736.84 = 1,938.16/x
  3. Step 3: Cross multiply
    1,989.04x = 2,736.84 × 1,938.16
  4. Step 4: Simplify right side
    1,989.04x = 5,304,433.81
  5. Step 5: Solve for x
    x = 5,304,433.81/1,989.04
  6. Step 6: Final answer
    x = 2,666.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.