Home / 3,898.66-5,380.16-2,130.30

Finding the Fourth Proportional to 3,898.66, 5,380.16 and 2,130.30

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Solution

The fourth proportional to 3,898.66, 5,380.16 and 2,130.30 is: 2,939.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.66 : 5,380.16 = 2,130.30 : x
  2. Step 2: Convert to fraction form
    3,898.66/5,380.16 = 2,130.30/x
  3. Step 3: Cross multiply
    3,898.66x = 5,380.16 × 2,130.30
  4. Step 4: Simplify right side
    3,898.66x = 11,461,354.85
  5. Step 5: Solve for x
    x = 11,461,354.85/3,898.66
  6. Step 6: Final answer
    x = 2,939.82

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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.