Home / 2,156.28-3,209.16-2,143.32

Finding the Fourth Proportional to 2,156.28, 3,209.16 and 2,143.32

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Solution

The fourth proportional to 2,156.28, 3,209.16 and 2,143.32 is: 3,189.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.28 : 3,209.16 = 2,143.32 : x
  2. Step 2: Convert to fraction form
    2,156.28/3,209.16 = 2,143.32/x
  3. Step 3: Cross multiply
    2,156.28x = 3,209.16 × 2,143.32
  4. Step 4: Simplify right side
    2,156.28x = 6,878,256.81
  5. Step 5: Solve for x
    x = 6,878,256.81/2,156.28
  6. Step 6: Final answer
    x = 3,189.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.