Home / 20,591.19-28,415.85-11,159.82

Finding the Fourth Proportional to 20,591.19, 28,415.85 and 11,159.82

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Solution

The fourth proportional to 20,591.19, 28,415.85 and 11,159.82 is: 15,400.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.19 : 28,415.85 = 11,159.82 : x
  2. Step 2: Convert to fraction form
    20,591.19/28,415.85 = 11,159.82/x
  3. Step 3: Cross multiply
    20,591.19x = 28,415.85 × 11,159.82
  4. Step 4: Simplify right side
    20,591.19x = 317,115,771.15
  5. Step 5: Solve for x
    x = 317,115,771.15/20,591.19
  6. Step 6: Final answer
    x = 15,400.56

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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.