Home / 3,899.02-5,378.64-2,640.13

Finding the Fourth Proportional to 3,899.02, 5,378.64 and 2,640.13

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Solution

The fourth proportional to 3,899.02, 5,378.64 and 2,640.13 is: 3,642.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.02 : 5,378.64 = 2,640.13 : x
  2. Step 2: Convert to fraction form
    3,899.02/5,378.64 = 2,640.13/x
  3. Step 3: Cross multiply
    3,899.02x = 5,378.64 × 2,640.13
  4. Step 4: Simplify right side
    3,899.02x = 14,200,308.82
  5. Step 5: Solve for x
    x = 14,200,308.82/3,899.02
  6. Step 6: Final answer
    x = 3,642.02

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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.