Home / 20,785.11-28,683.27-11,353.47

Finding the Fourth Proportional to 20,785.11, 28,683.27 and 11,353.47

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Solution

The fourth proportional to 20,785.11, 28,683.27 and 11,353.47 is: 15,667.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.11 : 28,683.27 = 11,353.47 : x
  2. Step 2: Convert to fraction form
    20,785.11/28,683.27 = 11,353.47/x
  3. Step 3: Cross multiply
    20,785.11x = 28,683.27 × 11,353.47
  4. Step 4: Simplify right side
    20,785.11x = 325,654,645.45
  5. Step 5: Solve for x
    x = 325,654,645.45/20,785.11
  6. Step 6: Final answer
    x = 15,667.69

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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.