Home / 3,898.02-5,381.39-2,638.68

Finding the Fourth Proportional to 3,898.02, 5,381.39 and 2,638.68

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Solution

The fourth proportional to 3,898.02, 5,381.39 and 2,638.68 is: 3,642.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.02 : 5,381.39 = 2,638.68 : x
  2. Step 2: Convert to fraction form
    3,898.02/5,381.39 = 2,638.68/x
  3. Step 3: Cross multiply
    3,898.02x = 5,381.39 × 2,638.68
  4. Step 4: Simplify right side
    3,898.02x = 14,199,737.74
  5. Step 5: Solve for x
    x = 14,199,737.74/3,898.02
  6. Step 6: Final answer
    x = 3,642.80

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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.