Home / 20,712.39-28,583.43-11,280.96

Finding the Fourth Proportional to 20,712.39, 28,583.43 and 11,280.96

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Solution

The fourth proportional to 20,712.39, 28,583.43 and 11,280.96 is: 15,567.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.39 : 28,583.43 = 11,280.96 : x
  2. Step 2: Convert to fraction form
    20,712.39/28,583.43 = 11,280.96/x
  3. Step 3: Cross multiply
    20,712.39x = 28,583.43 × 11,280.96
  4. Step 4: Simplify right side
    20,712.39x = 322,448,429.88
  5. Step 5: Solve for x
    x = 322,448,429.88/20,712.39
  6. Step 6: Final answer
    x = 15,567.90

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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.