Home / 2,957.92-4,076.40-2,128.48

Finding the Fourth Proportional to 2,957.92, 4,076.40 and 2,128.48

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Solution

The fourth proportional to 2,957.92, 4,076.40 and 2,128.48 is: 2,933.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,957.92 : 4,076.40 = 2,128.48 : x
  2. Step 2: Convert to fraction form
    2,957.92/4,076.40 = 2,128.48/x
  3. Step 3: Cross multiply
    2,957.92x = 4,076.40 × 2,128.48
  4. Step 4: Simplify right side
    2,957.92x = 8,676,535.87
  5. Step 5: Solve for x
    x = 8,676,535.87/2,957.92
  6. Step 6: Final answer
    x = 2,933.32

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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.