Home / 20,739.64-28,620.46-11,308.28

Finding the Fourth Proportional to 20,739.64, 28,620.46 and 11,308.28

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Solution

The fourth proportional to 20,739.64, 28,620.46 and 11,308.28 is: 15,605.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.64 : 28,620.46 = 11,308.28 : x
  2. Step 2: Convert to fraction form
    20,739.64/28,620.46 = 11,308.28/x
  3. Step 3: Cross multiply
    20,739.64x = 28,620.46 × 11,308.28
  4. Step 4: Simplify right side
    20,739.64x = 323,648,175.41
  5. Step 5: Solve for x
    x = 323,648,175.41/20,739.64
  6. Step 6: Final answer
    x = 15,605.29

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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.