Home / 6,638.52-9,158.40-4,119.78

Finding the Fourth Proportional to 6,638.52, 9,158.40 and 4,119.78

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Solution

The fourth proportional to 6,638.52, 9,158.40 and 4,119.78 is: 5,683.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.52 : 9,158.40 = 4,119.78 : x
  2. Step 2: Convert to fraction form
    6,638.52/9,158.40 = 4,119.78/x
  3. Step 3: Cross multiply
    6,638.52x = 9,158.40 × 4,119.78
  4. Step 4: Simplify right side
    6,638.52x = 37,730,593.15
  5. Step 5: Solve for x
    x = 37,730,593.15/6,638.52
  6. Step 6: Final answer
    x = 5,683.59

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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.