Home / 28,236.10-38,965.89-15,489.40

Finding the Fourth Proportional to 28,236.10, 38,965.89 and 15,489.40

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Solution

The fourth proportional to 28,236.10, 38,965.89 and 15,489.40 is: 21,375.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,236.10 : 38,965.89 = 15,489.40 : x
  2. Step 2: Convert to fraction form
    28,236.10/38,965.89 = 15,489.40/x
  3. Step 3: Cross multiply
    28,236.10x = 38,965.89 × 15,489.40
  4. Step 4: Simplify right side
    28,236.10x = 603,558,179.12
  5. Step 5: Solve for x
    x = 603,558,179.12/28,236.10
  6. Step 6: Final answer
    x = 21,375.41

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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.