Home / 3,720.31-5,124.86-3,187.45

Finding the Fourth Proportional to 3,720.31, 5,124.86 and 3,187.45

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Solution

The fourth proportional to 3,720.31, 5,124.86 and 3,187.45 is: 4,390.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.31 : 5,124.86 = 3,187.45 : x
  2. Step 2: Convert to fraction form
    3,720.31/5,124.86 = 3,187.45/x
  3. Step 3: Cross multiply
    3,720.31x = 5,124.86 × 3,187.45
  4. Step 4: Simplify right side
    3,720.31x = 16,335,237.43
  5. Step 5: Solve for x
    x = 16,335,237.43/3,720.31
  6. Step 6: Final answer
    x = 4,390.83

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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.