Home / 20,618.75-28,453.93-11,187.32

Finding the Fourth Proportional to 20,618.75, 28,453.93 and 11,187.32

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Solution

The fourth proportional to 20,618.75, 28,453.93 and 11,187.32 is: 15,438.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.75 : 28,453.93 = 11,187.32 : x
  2. Step 2: Convert to fraction form
    20,618.75/28,453.93 = 11,187.32/x
  3. Step 3: Cross multiply
    20,618.75x = 28,453.93 × 11,187.32
  4. Step 4: Simplify right side
    20,618.75x = 318,323,112.86
  5. Step 5: Solve for x
    x = 318,323,112.86/20,618.75
  6. Step 6: Final answer
    x = 15,438.52

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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.