Home / 20,785.70-28,683.80-11,354.30

Finding the Fourth Proportional to 20,785.70, 28,683.80 and 11,354.30

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Solution

The fourth proportional to 20,785.70, 28,683.80 and 11,354.30 is: 15,668.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.70 : 28,683.80 = 11,354.30 : x
  2. Step 2: Convert to fraction form
    20,785.70/28,683.80 = 11,354.30/x
  3. Step 3: Cross multiply
    20,785.70x = 28,683.80 × 11,354.30
  4. Step 4: Simplify right side
    20,785.70x = 325,684,470.34
  5. Step 5: Solve for x
    x = 325,684,470.34/20,785.70
  6. Step 6: Final answer
    x = 15,668.68

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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.