Home / 28,272.25-39,015.75-15,523.40

Finding the Fourth Proportional to 28,272.25, 39,015.75 and 15,523.40

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Solution

The fourth proportional to 28,272.25, 39,015.75 and 15,523.40 is: 21,422.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,272.25 : 39,015.75 = 15,523.40 : x
  2. Step 2: Convert to fraction form
    28,272.25/39,015.75 = 15,523.40/x
  3. Step 3: Cross multiply
    28,272.25x = 39,015.75 × 15,523.40
  4. Step 4: Simplify right side
    28,272.25x = 605,657,093.55
  5. Step 5: Solve for x
    x = 605,657,093.55/28,272.25
  6. Step 6: Final answer
    x = 21,422.32

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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.