Home / 3,131.13-4,705.80-3,112.90

Finding the Fourth Proportional to 3,131.13, 4,705.80 and 3,112.90

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Solution

The fourth proportional to 3,131.13, 4,705.80 and 3,112.90 is: 4,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.13 : 4,705.80 = 3,112.90 : x
  2. Step 2: Convert to fraction form
    3,131.13/4,705.80 = 3,112.90/x
  3. Step 3: Cross multiply
    3,131.13x = 4,705.80 × 3,112.90
  4. Step 4: Simplify right side
    3,131.13x = 14,648,684.82
  5. Step 5: Solve for x
    x = 14,648,684.82/3,131.13
  6. Step 6: Final answer
    x = 4,678.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.