Home / 3,971.48-5,479.53-3,129.58

Finding the Fourth Proportional to 3,971.48, 5,479.53 and 3,129.58

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Solution

The fourth proportional to 3,971.48, 5,479.53 and 3,129.58 is: 4,317.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.48 : 5,479.53 = 3,129.58 : x
  2. Step 2: Convert to fraction form
    3,971.48/5,479.53 = 3,129.58/x
  3. Step 3: Cross multiply
    3,971.48x = 5,479.53 × 3,129.58
  4. Step 4: Simplify right side
    3,971.48x = 17,148,600.10
  5. Step 5: Solve for x
    x = 17,148,600.10/3,971.48
  6. Step 6: Final answer
    x = 4,317.94

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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.