Home / 20,591.25-28,415.96-11,159.81

Finding the Fourth Proportional to 20,591.25, 28,415.96 and 11,159.81

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Solution

The fourth proportional to 20,591.25, 28,415.96 and 11,159.81 is: 15,400.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.25 : 28,415.96 = 11,159.81 : x
  2. Step 2: Convert to fraction form
    20,591.25/28,415.96 = 11,159.81/x
  3. Step 3: Cross multiply
    20,591.25x = 28,415.96 × 11,159.81
  4. Step 4: Simplify right side
    20,591.25x = 317,116,658.77
  5. Step 5: Solve for x
    x = 317,116,658.77/20,591.25
  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.