Home / 20,488.06-28,272.57-11,412.94

Finding the Fourth Proportional to 20,488.06, 28,272.57 and 11,412.94

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Solution

The fourth proportional to 20,488.06, 28,272.57 and 11,412.94 is: 15,749.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.06 : 28,272.57 = 11,412.94 : x
  2. Step 2: Convert to fraction form
    20,488.06/28,272.57 = 11,412.94/x
  3. Step 3: Cross multiply
    20,488.06x = 28,272.57 × 11,412.94
  4. Step 4: Simplify right side
    20,488.06x = 322,673,145.06
  5. Step 5: Solve for x
    x = 322,673,145.06/20,488.06
  6. Step 6: Final answer
    x = 15,749.33

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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.