Home / 2,157.12-3,235.68-1,386

Finding the Fourth Proportional to 2,157.12, 3,235.68 and 1,386

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Solution

The fourth proportional to 2,157.12, 3,235.68 and 1,386 is: 2,079

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.12 : 3,235.68 = 1,386 : x
  2. Step 2: Convert to fraction form
    2,157.12/3,235.68 = 1,386/x
  3. Step 3: Cross multiply
    2,157.12x = 3,235.68 × 1,386
  4. Step 4: Simplify right side
    2,157.12x = 4,484,652.48
  5. Step 5: Solve for x
    x = 4,484,652.48/2,157.12
  6. Step 6: Final answer
    x = 2,079

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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.