Home / 28,236.12-38,965.58-15,489.05

Finding the Fourth Proportional to 28,236.12, 38,965.58 and 15,489.05

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Solution

The fourth proportional to 28,236.12, 38,965.58 and 15,489.05 is: 21,374.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,236.12 : 38,965.58 = 15,489.05 : x
  2. Step 2: Convert to fraction form
    28,236.12/38,965.58 = 15,489.05/x
  3. Step 3: Cross multiply
    28,236.12x = 38,965.58 × 15,489.05
  4. Step 4: Simplify right side
    28,236.12x = 603,539,544.63
  5. Step 5: Solve for x
    x = 603,539,544.63/28,236.12
  6. Step 6: Final answer
    x = 21,374.73

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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.