Home / 2,126.79-2,934.81-1,382.18

Finding the Fourth Proportional to 2,126.79, 2,934.81 and 1,382.18

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Solution

The fourth proportional to 2,126.79, 2,934.81 and 1,382.18 is: 1,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.79 : 2,934.81 = 1,382.18 : x
  2. Step 2: Convert to fraction form
    2,126.79/2,934.81 = 1,382.18/x
  3. Step 3: Cross multiply
    2,126.79x = 2,934.81 × 1,382.18
  4. Step 4: Simplify right side
    2,126.79x = 4,056,421.01
  5. Step 5: Solve for x
    x = 4,056,421.01/2,126.79
  6. Step 6: Final answer
    x = 1,907.30

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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.