Home / 20,421.54-28,180.62-11,467.62

Finding the Fourth Proportional to 20,421.54, 28,180.62 and 11,467.62

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Solution

The fourth proportional to 20,421.54, 28,180.62 and 11,467.62 is: 15,824.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.54 : 28,180.62 = 11,467.62 : x
  2. Step 2: Convert to fraction form
    20,421.54/28,180.62 = 11,467.62/x
  3. Step 3: Cross multiply
    20,421.54x = 28,180.62 × 11,467.62
  4. Step 4: Simplify right side
    20,421.54x = 323,164,641.52
  5. Step 5: Solve for x
    x = 323,164,641.52/20,421.54
  6. Step 6: Final answer
    x = 15,824.69

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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.