Home / 3,899.27-5,381.01-2,130.91

Finding the Fourth Proportional to 3,899.27, 5,381.01 and 2,130.91

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Solution

The fourth proportional to 3,899.27, 5,381.01 and 2,130.91 is: 2,940.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.27 : 5,381.01 = 2,130.91 : x
  2. Step 2: Convert to fraction form
    3,899.27/5,381.01 = 2,130.91/x
  3. Step 3: Cross multiply
    3,899.27x = 5,381.01 × 2,130.91
  4. Step 4: Simplify right side
    3,899.27x = 11,466,421.11
  5. Step 5: Solve for x
    x = 11,466,421.11/3,899.27
  6. Step 6: Final answer
    x = 2,940.66

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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.