Home / 31,629.21-43,663.55-20,315.61

Finding the Fourth Proportional to 31,629.21, 43,663.55 and 20,315.61

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Solution

The fourth proportional to 31,629.21, 43,663.55 and 20,315.61 is: 28,045.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,629.21 : 43,663.55 = 20,315.61 : x
  2. Step 2: Convert to fraction form
    31,629.21/43,663.55 = 20,315.61/x
  3. Step 3: Cross multiply
    31,629.21x = 43,663.55 × 20,315.61
  4. Step 4: Simplify right side
    31,629.21x = 887,051,551.44
  5. Step 5: Solve for x
    x = 887,051,551.44/31,629.21
  6. Step 6: Final answer
    x = 28,045.33

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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.