Home / 20,816.26-28,699.32-15,151.93

Finding the Fourth Proportional to 20,816.26, 28,699.32 and 15,151.93

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Solution

The fourth proportional to 20,816.26, 28,699.32 and 15,151.93 is: 20,889.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.26 : 28,699.32 = 15,151.93 : x
  2. Step 2: Convert to fraction form
    20,816.26/28,699.32 = 15,151.93/x
  3. Step 3: Cross multiply
    20,816.26x = 28,699.32 × 15,151.93
  4. Step 4: Simplify right side
    20,816.26x = 434,850,087.69
  5. Step 5: Solve for x
    x = 434,850,087.69/20,816.26
  6. Step 6: Final answer
    x = 20,889.92

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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.