Home / 20,928.06-28,881-11,496.69

Finding the Fourth Proportional to 20,928.06, 28,881 and 11,496.69

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Solution

The fourth proportional to 20,928.06, 28,881 and 11,496.69 is: 15,865.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.06 : 28,881 = 11,496.69 : x
  2. Step 2: Convert to fraction form
    20,928.06/28,881 = 11,496.69/x
  3. Step 3: Cross multiply
    20,928.06x = 28,881 × 11,496.69
  4. Step 4: Simplify right side
    20,928.06x = 332,035,903.89
  5. Step 5: Solve for x
    x = 332,035,903.89/20,928.06
  6. Step 6: Final answer
    x = 15,865.58

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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.