Home / 31,394.39-43,291.67-21,845.09

Finding the Fourth Proportional to 31,394.39, 43,291.67 and 21,845.09

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Solution

The fourth proportional to 31,394.39, 43,291.67 and 21,845.09 is: 30,123.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,394.39 : 43,291.67 = 21,845.09 : x
  2. Step 2: Convert to fraction form
    31,394.39/43,291.67 = 21,845.09/x
  3. Step 3: Cross multiply
    31,394.39x = 43,291.67 × 21,845.09
  4. Step 4: Simplify right side
    31,394.39x = 945,710,426.40
  5. Step 5: Solve for x
    x = 945,710,426.40/31,394.39
  6. Step 6: Final answer
    x = 30,123.55

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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.