Home / 28,540.75-39,386.28-15,965.50

Finding the Fourth Proportional to 28,540.75, 39,386.28 and 15,965.50

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Solution

The fourth proportional to 28,540.75, 39,386.28 and 15,965.50 is: 22,032.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,540.75 : 39,386.28 = 15,965.50 : x
  2. Step 2: Convert to fraction form
    28,540.75/39,386.28 = 15,965.50/x
  3. Step 3: Cross multiply
    28,540.75x = 39,386.28 × 15,965.50
  4. Step 4: Simplify right side
    28,540.75x = 628,821,653.34
  5. Step 5: Solve for x
    x = 628,821,653.34/28,540.75
  6. Step 6: Final answer
    x = 22,032.42

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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.