Home / 2,825.15-3,900.65-2,160.84

Finding the Fourth Proportional to 2,825.15, 3,900.65 and 2,160.84

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Solution

The fourth proportional to 2,825.15, 3,900.65 and 2,160.84 is: 2,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.15 : 3,900.65 = 2,160.84 : x
  2. Step 2: Convert to fraction form
    2,825.15/3,900.65 = 2,160.84/x
  3. Step 3: Cross multiply
    2,825.15x = 3,900.65 × 2,160.84
  4. Step 4: Simplify right side
    2,825.15x = 8,428,669.74
  5. Step 5: Solve for x
    x = 8,428,669.74/2,825.15
  6. Step 6: Final answer
    x = 2,983.45

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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.