Home / 20,428.09-28,188.14-11,924.06

Finding the Fourth Proportional to 20,428.09, 28,188.14 and 11,924.06

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Solution

The fourth proportional to 20,428.09, 28,188.14 and 11,924.06 is: 16,453.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.09 : 28,188.14 = 11,924.06 : x
  2. Step 2: Convert to fraction form
    20,428.09/28,188.14 = 11,924.06/x
  3. Step 3: Cross multiply
    20,428.09x = 28,188.14 × 11,924.06
  4. Step 4: Simplify right side
    20,428.09x = 336,117,030.65
  5. Step 5: Solve for x
    x = 336,117,030.65/20,428.09
  6. Step 6: Final answer
    x = 16,453.67

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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.