Home / 31,129.20-46,693.80-13,633.20

Finding the Fourth Proportional to 31,129.20, 46,693.80 and 13,633.20

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Solution

The fourth proportional to 31,129.20, 46,693.80 and 13,633.20 is: 20,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,129.20 : 46,693.80 = 13,633.20 : x
  2. Step 2: Convert to fraction form
    31,129.20/46,693.80 = 13,633.20/x
  3. Step 3: Cross multiply
    31,129.20x = 46,693.80 × 13,633.20
  4. Step 4: Simplify right side
    31,129.20x = 636,585,914.16
  5. Step 5: Solve for x
    x = 636,585,914.16/31,129.20
  6. Step 6: Final answer
    x = 20,449.80

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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.