Home / 20,400.11-28,152.66-11,448.33

Finding the Fourth Proportional to 20,400.11, 28,152.66 and 11,448.33

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Solution

The fourth proportional to 20,400.11, 28,152.66 and 11,448.33 is: 15,798.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.11 : 28,152.66 = 11,448.33 : x
  2. Step 2: Convert to fraction form
    20,400.11/28,152.66 = 11,448.33/x
  3. Step 3: Cross multiply
    20,400.11x = 28,152.66 × 11,448.33
  4. Step 4: Simplify right side
    20,400.11x = 322,300,942.06
  5. Step 5: Solve for x
    x = 322,300,942.06/20,400.11
  6. Step 6: Final answer
    x = 15,798.98

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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.