Home / 28,213.60-38,917.08-18,155.12

Finding the Fourth Proportional to 28,213.60, 38,917.08 and 18,155.12

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Solution

The fourth proportional to 28,213.60, 38,917.08 and 18,155.12 is: 25,042.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.60 : 38,917.08 = 18,155.12 : x
  2. Step 2: Convert to fraction form
    28,213.60/38,917.08 = 18,155.12/x
  3. Step 3: Cross multiply
    28,213.60x = 38,917.08 × 18,155.12
  4. Step 4: Simplify right side
    28,213.60x = 706,544,257.45
  5. Step 5: Solve for x
    x = 706,544,257.45/28,213.60
  6. Step 6: Final answer
    x = 25,042.68

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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.