Home / 31,628.39-47,431.40-13,867.65

Finding the Fourth Proportional to 31,628.39, 47,431.40 and 13,867.65

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Solution

The fourth proportional to 31,628.39, 47,431.40 and 13,867.65 is: 20,796.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,628.39 : 47,431.40 = 13,867.65 : x
  2. Step 2: Convert to fraction form
    31,628.39/47,431.40 = 13,867.65/x
  3. Step 3: Cross multiply
    31,628.39x = 47,431.40 × 13,867.65
  4. Step 4: Simplify right side
    31,628.39x = 657,761,984.87
  5. Step 5: Solve for x
    x = 657,761,984.87/31,628.39
  6. Step 6: Final answer
    x = 20,796.57

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1.5x scale

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.