Home / 31,378.80-43,315.08-18,801.12

Finding the Fourth Proportional to 31,378.80, 43,315.08 and 18,801.12

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Solution

The fourth proportional to 31,378.80, 43,315.08 and 18,801.12 is: 25,952.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,378.80 : 43,315.08 = 18,801.12 : x
  2. Step 2: Convert to fraction form
    31,378.80/43,315.08 = 18,801.12/x
  3. Step 3: Cross multiply
    31,378.80x = 43,315.08 × 18,801.12
  4. Step 4: Simplify right side
    31,378.80x = 814,372,016.89
  5. Step 5: Solve for x
    x = 814,372,016.89/31,378.80
  6. Step 6: Final answer
    x = 25,952.94

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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.