Home / 2,816.60-3,886.81-1,557.65

Finding the Fourth Proportional to 2,816.60, 3,886.81 and 1,557.65

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Solution

The fourth proportional to 2,816.60, 3,886.81 and 1,557.65 is: 2,149.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.60 : 3,886.81 = 1,557.65 : x
  2. Step 2: Convert to fraction form
    2,816.60/3,886.81 = 1,557.65/x
  3. Step 3: Cross multiply
    2,816.60x = 3,886.81 × 1,557.65
  4. Step 4: Simplify right side
    2,816.60x = 6,054,277.94
  5. Step 5: Solve for x
    x = 6,054,277.94/2,816.60
  6. Step 6: Final answer
    x = 2,149.50

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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.