Home / 20,320.45-28,039.64-11,825.32

Finding the Fourth Proportional to 20,320.45, 28,039.64 and 11,825.32

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Solution

The fourth proportional to 20,320.45, 28,039.64 and 11,825.32 is: 16,317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.45 : 28,039.64 = 11,825.32 : x
  2. Step 2: Convert to fraction form
    20,320.45/28,039.64 = 11,825.32/x
  3. Step 3: Cross multiply
    20,320.45x = 28,039.64 × 11,825.32
  4. Step 4: Simplify right side
    20,320.45x = 331,577,715.68
  5. Step 5: Solve for x
    x = 331,577,715.68/20,320.45
  6. Step 6: Final answer
    x = 16,317.44

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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.