Home / 3,173.72-4,739.49-3,139.40

Finding the Fourth Proportional to 3,173.72, 4,739.49 and 3,139.40

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Solution

The fourth proportional to 3,173.72, 4,739.49 and 3,139.40 is: 4,688.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,173.72 : 4,739.49 = 3,139.40 : x
  2. Step 2: Convert to fraction form
    3,173.72/4,739.49 = 3,139.40/x
  3. Step 3: Cross multiply
    3,173.72x = 4,739.49 × 3,139.40
  4. Step 4: Simplify right side
    3,173.72x = 14,879,166.75
  5. Step 5: Solve for x
    x = 14,879,166.75/3,173.72
  6. Step 6: Final answer
    x = 4,688.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.