Home / 3,151.56-4,347.90-1,971.84

Finding the Fourth Proportional to 3,151.56, 4,347.90 and 1,971.84

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Solution

The fourth proportional to 3,151.56, 4,347.90 and 1,971.84 is: 2,720.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.56 : 4,347.90 = 1,971.84 : x
  2. Step 2: Convert to fraction form
    3,151.56/4,347.90 = 1,971.84/x
  3. Step 3: Cross multiply
    3,151.56x = 4,347.90 × 1,971.84
  4. Step 4: Simplify right side
    3,151.56x = 8,573,363.14
  5. Step 5: Solve for x
    x = 8,573,363.14/3,151.56
  6. Step 6: Final answer
    x = 2,720.36

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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.