Home / 20,619.09-28,454.34-11,187.63

Finding the Fourth Proportional to 20,619.09, 28,454.34 and 11,187.63

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Solution

The fourth proportional to 20,619.09, 28,454.34 and 11,187.63 is: 15,438.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.09 : 28,454.34 = 11,187.63 : x
  2. Step 2: Convert to fraction form
    20,619.09/28,454.34 = 11,187.63/x
  3. Step 3: Cross multiply
    20,619.09x = 28,454.34 × 11,187.63
  4. Step 4: Simplify right side
    20,619.09x = 318,336,627.81
  5. Step 5: Solve for x
    x = 318,336,627.81/20,619.09
  6. Step 6: Final answer
    x = 15,438.93

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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.