Home / 2,158.28-3,212.14-2,145.32

Finding the Fourth Proportional to 2,158.28, 3,212.14 and 2,145.32

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Solution

The fourth proportional to 2,158.28, 3,212.14 and 2,145.32 is: 3,192.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.28 : 3,212.14 = 2,145.32 : x
  2. Step 2: Convert to fraction form
    2,158.28/3,212.14 = 2,145.32/x
  3. Step 3: Cross multiply
    2,158.28x = 3,212.14 × 2,145.32
  4. Step 4: Simplify right side
    2,158.28x = 6,891,068.18
  5. Step 5: Solve for x
    x = 6,891,068.18/2,158.28
  6. Step 6: Final answer
    x = 3,192.85

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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.