Home / 2,129.89-2,938.43-1,571.70

Finding the Fourth Proportional to 2,129.89, 2,938.43 and 1,571.70

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Solution

The fourth proportional to 2,129.89, 2,938.43 and 1,571.70 is: 2,168.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.89 : 2,938.43 = 1,571.70 : x
  2. Step 2: Convert to fraction form
    2,129.89/2,938.43 = 1,571.70/x
  3. Step 3: Cross multiply
    2,129.89x = 2,938.43 × 1,571.70
  4. Step 4: Simplify right side
    2,129.89x = 4,618,320.01
  5. Step 5: Solve for x
    x = 4,618,320.01/2,129.89
  6. Step 6: Final answer
    x = 2,168.34

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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.