Home / 20,785.25-28,683.65-11,353.81

Finding the Fourth Proportional to 20,785.25, 28,683.65 and 11,353.81

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Solution

The fourth proportional to 20,785.25, 28,683.65 and 11,353.81 is: 15,668.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.25 : 28,683.65 = 11,353.81 : x
  2. Step 2: Convert to fraction form
    20,785.25/28,683.65 = 11,353.81/x
  3. Step 3: Cross multiply
    20,785.25x = 28,683.65 × 11,353.81
  4. Step 4: Simplify right side
    20,785.25x = 325,668,712.21
  5. Step 5: Solve for x
    x = 325,668,712.21/20,785.25
  6. Step 6: Final answer
    x = 15,668.26

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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.