Home / 4,090.40-5,640.12-2,975.06

Finding the Fourth Proportional to 4,090.40, 5,640.12 and 2,975.06

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Solution

The fourth proportional to 4,090.40, 5,640.12 and 2,975.06 is: 4,102.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,090.40 : 5,640.12 = 2,975.06 : x
  2. Step 2: Convert to fraction form
    4,090.40/5,640.12 = 2,975.06/x
  3. Step 3: Cross multiply
    4,090.40x = 5,640.12 × 2,975.06
  4. Step 4: Simplify right side
    4,090.40x = 16,779,695.41
  5. Step 5: Solve for x
    x = 16,779,695.41/4,090.40
  6. Step 6: Final answer
    x = 4,102.21

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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.