Home / 20,739.32-28,620.45-11,308.07

Finding the Fourth Proportional to 20,739.32, 28,620.45 and 11,308.07

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Solution

The fourth proportional to 20,739.32, 28,620.45 and 11,308.07 is: 15,605.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.32 : 28,620.45 = 11,308.07 : x
  2. Step 2: Convert to fraction form
    20,739.32/28,620.45 = 11,308.07/x
  3. Step 3: Cross multiply
    20,739.32x = 28,620.45 × 11,308.07
  4. Step 4: Simplify right side
    20,739.32x = 323,642,052.03
  5. Step 5: Solve for x
    x = 323,642,052.03/20,739.32
  6. Step 6: Final answer
    x = 15,605.24

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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.