Home / 21,327.60-32,029.80-20,636.40

Finding the Fourth Proportional to 21,327.60, 32,029.80 and 20,636.40

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Solution

The fourth proportional to 21,327.60, 32,029.80 and 20,636.40 is: 30,991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.60 : 32,029.80 = 20,636.40 : x
  2. Step 2: Convert to fraction form
    21,327.60/32,029.80 = 20,636.40/x
  3. Step 3: Cross multiply
    21,327.60x = 32,029.80 × 20,636.40
  4. Step 4: Simplify right side
    21,327.60x = 660,979,764.72
  5. Step 5: Solve for x
    x = 660,979,764.72/21,327.60
  6. Step 6: Final answer
    x = 30,991.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.