Home / 20,638.64-28,481.90-11,207.80

Finding the Fourth Proportional to 20,638.64, 28,481.90 and 11,207.80

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Solution

The fourth proportional to 20,638.64, 28,481.90 and 11,207.80 is: 15,467.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.64 : 28,481.90 = 11,207.80 : x
  2. Step 2: Convert to fraction form
    20,638.64/28,481.90 = 11,207.80/x
  3. Step 3: Cross multiply
    20,638.64x = 28,481.90 × 11,207.80
  4. Step 4: Simplify right side
    20,638.64x = 319,219,438.82
  5. Step 5: Solve for x
    x = 319,219,438.82/20,638.64
  6. Step 6: Final answer
    x = 15,467.08

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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.