Home / 2,816.77-3,886.90-1,557.83

Finding the Fourth Proportional to 2,816.77, 3,886.90 and 1,557.83

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Solution

The fourth proportional to 2,816.77, 3,886.90 and 1,557.83 is: 2,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.77 : 3,886.90 = 1,557.83 : x
  2. Step 2: Convert to fraction form
    2,816.77/3,886.90 = 1,557.83/x
  3. Step 3: Cross multiply
    2,816.77x = 3,886.90 × 1,557.83
  4. Step 4: Simplify right side
    2,816.77x = 6,055,129.43
  5. Step 5: Solve for x
    x = 6,055,129.43/2,816.77
  6. Step 6: Final answer
    x = 2,149.67

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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.