Home / 20,653.44-28,501.44-11,578.64

Finding the Fourth Proportional to 20,653.44, 28,501.44 and 11,578.64

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Solution

The fourth proportional to 20,653.44, 28,501.44 and 11,578.64 is: 15,978.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.44 : 28,501.44 = 11,578.64 : x
  2. Step 2: Convert to fraction form
    20,653.44/28,501.44 = 11,578.64/x
  3. Step 3: Cross multiply
    20,653.44x = 28,501.44 × 11,578.64
  4. Step 4: Simplify right side
    20,653.44x = 330,007,913.24
  5. Step 5: Solve for x
    x = 330,007,913.24/20,653.44
  6. Step 6: Final answer
    x = 15,978.35

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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.