Home / 28,378.71-39,163.63-17,629.47

Finding the Fourth Proportional to 28,378.71, 39,163.63 and 17,629.47

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Solution

The fourth proportional to 28,378.71, 39,163.63 and 17,629.47 is: 24,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.71 : 39,163.63 = 17,629.47 : x
  2. Step 2: Convert to fraction form
    28,378.71/39,163.63 = 17,629.47/x
  3. Step 3: Cross multiply
    28,378.71x = 39,163.63 × 17,629.47
  4. Step 4: Simplify right side
    28,378.71x = 690,434,040.18
  5. Step 5: Solve for x
    x = 690,434,040.18/28,378.71
  6. Step 6: Final answer
    x = 24,329.30

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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.