Home / 21,815.60-32,723.40-20,211.80

Finding the Fourth Proportional to 21,815.60, 32,723.40 and 20,211.80

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Solution

The fourth proportional to 21,815.60, 32,723.40 and 20,211.80 is: 30,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.60 : 32,723.40 = 20,211.80 : x
  2. Step 2: Convert to fraction form
    21,815.60/32,723.40 = 20,211.80/x
  3. Step 3: Cross multiply
    21,815.60x = 32,723.40 × 20,211.80
  4. Step 4: Simplify right side
    21,815.60x = 661,398,816.12
  5. Step 5: Solve for x
    x = 661,398,816.12/21,815.60
  6. Step 6: Final answer
    x = 30,317.70

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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.