Home / 2,128.82-2,939.21-1,332.45

Finding the Fourth Proportional to 2,128.82, 2,939.21 and 1,332.45

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Solution

The fourth proportional to 2,128.82, 2,939.21 and 1,332.45 is: 1,839.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.82 : 2,939.21 = 1,332.45 : x
  2. Step 2: Convert to fraction form
    2,128.82/2,939.21 = 1,332.45/x
  3. Step 3: Cross multiply
    2,128.82x = 2,939.21 × 1,332.45
  4. Step 4: Simplify right side
    2,128.82x = 3,916,343.70
  5. Step 5: Solve for x
    x = 3,916,343.70/2,128.82
  6. Step 6: Final answer
    x = 1,839.68

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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.