Home / 20,376.54-28,119.52-11,424.06

Finding the Fourth Proportional to 20,376.54, 28,119.52 and 11,424.06

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Solution

The fourth proportional to 20,376.54, 28,119.52 and 11,424.06 is: 15,765.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.54 : 28,119.52 = 11,424.06 : x
  2. Step 2: Convert to fraction form
    20,376.54/28,119.52 = 11,424.06/x
  3. Step 3: Cross multiply
    20,376.54x = 28,119.52 × 11,424.06
  4. Step 4: Simplify right side
    20,376.54x = 321,239,083.65
  5. Step 5: Solve for x
    x = 321,239,083.65/20,376.54
  6. Step 6: Final answer
    x = 15,765.14

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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.