Home / 20,464.80-28,239.36-11,511.52

Finding the Fourth Proportional to 20,464.80, 28,239.36 and 11,511.52

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Solution

The fourth proportional to 20,464.80, 28,239.36 and 11,511.52 is: 15,884.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464.80 : 28,239.36 = 11,511.52 : x
  2. Step 2: Convert to fraction form
    20,464.80/28,239.36 = 11,511.52/x
  3. Step 3: Cross multiply
    20,464.80x = 28,239.36 × 11,511.52
  4. Step 4: Simplify right side
    20,464.80x = 325,077,957.43
  5. Step 5: Solve for x
    x = 325,077,957.43/20,464.80
  6. Step 6: Final answer
    x = 15,884.74

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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.