Home / 28,955.75-39,958.94-15,707.75

Finding the Fourth Proportional to 28,955.75, 39,958.94 and 15,707.75

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Solution

The fourth proportional to 28,955.75, 39,958.94 and 15,707.75 is: 21,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,955.75 : 39,958.94 = 15,707.75 : x
  2. Step 2: Convert to fraction form
    28,955.75/39,958.94 = 15,707.75/x
  3. Step 3: Cross multiply
    28,955.75x = 39,958.94 × 15,707.75
  4. Step 4: Simplify right side
    28,955.75x = 627,665,039.79
  5. Step 5: Solve for x
    x = 627,665,039.79/28,955.75
  6. Step 6: Final answer
    x = 21,676.70

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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.