Home / 2,125.53-2,931.21-1,406.43

Finding the Fourth Proportional to 2,125.53, 2,931.21 and 1,406.43

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Solution

The fourth proportional to 2,125.53, 2,931.21 and 1,406.43 is: 1,939.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.53 : 2,931.21 = 1,406.43 : x
  2. Step 2: Convert to fraction form
    2,125.53/2,931.21 = 1,406.43/x
  3. Step 3: Cross multiply
    2,125.53x = 2,931.21 × 1,406.43
  4. Step 4: Simplify right side
    2,125.53x = 4,122,541.68
  5. Step 5: Solve for x
    x = 4,122,541.68/2,125.53
  6. Step 6: Final answer
    x = 1,939.54

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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.