Home / 20,739.48-28,620.78-11,308.52

Finding the Fourth Proportional to 20,739.48, 28,620.78 and 11,308.52

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Solution

The fourth proportional to 20,739.48, 28,620.78 and 11,308.52 is: 15,605.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.48 : 28,620.78 = 11,308.52 : x
  2. Step 2: Convert to fraction form
    20,739.48/28,620.78 = 11,308.52/x
  3. Step 3: Cross multiply
    20,739.48x = 28,620.78 × 11,308.52
  4. Step 4: Simplify right side
    20,739.48x = 323,658,663.05
  5. Step 5: Solve for x
    x = 323,658,663.05/20,739.48
  6. Step 6: Final answer
    x = 15,605.92

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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.