Home / 20,739.20-28,619.76-11,308.16

Finding the Fourth Proportional to 20,739.20, 28,619.76 and 11,308.16

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Solution

The fourth proportional to 20,739.20, 28,619.76 and 11,308.16 is: 15,605.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.20 : 28,619.76 = 11,308.16 : x
  2. Step 2: Convert to fraction form
    20,739.20/28,619.76 = 11,308.16/x
  3. Step 3: Cross multiply
    20,739.20x = 28,619.76 × 11,308.16
  4. Step 4: Simplify right side
    20,739.20x = 323,636,825.24
  5. Step 5: Solve for x
    x = 323,636,825.24/20,739.20
  6. Step 6: Final answer
    x = 15,605.08

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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.