Home / 20,412.75-28,169.70-11,460.36

Finding the Fourth Proportional to 20,412.75, 28,169.70 and 11,460.36

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Solution

The fourth proportional to 20,412.75, 28,169.70 and 11,460.36 is: 15,815.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.75 : 28,169.70 = 11,460.36 : x
  2. Step 2: Convert to fraction form
    20,412.75/28,169.70 = 11,460.36/x
  3. Step 3: Cross multiply
    20,412.75x = 28,169.70 × 11,460.36
  4. Step 4: Simplify right side
    20,412.75x = 322,834,903.09
  5. Step 5: Solve for x
    x = 322,834,903.09/20,412.75
  6. Step 6: Final answer
    x = 15,815.36

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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.