Home / 31,315.80-43,212.78-18,740.28

Finding the Fourth Proportional to 31,315.80, 43,212.78 and 18,740.28

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Solution

The fourth proportional to 31,315.80, 43,212.78 and 18,740.28 is: 25,859.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,315.80 : 43,212.78 = 18,740.28 : x
  2. Step 2: Convert to fraction form
    31,315.80/43,212.78 = 18,740.28/x
  3. Step 3: Cross multiply
    31,315.80x = 43,212.78 × 18,740.28
  4. Step 4: Simplify right side
    31,315.80x = 809,819,596.78
  5. Step 5: Solve for x
    x = 809,819,596.78/31,315.80
  6. Step 6: Final answer
    x = 25,859.78

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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.