Home / 21,939.40-32,909.10-20,470.60

Finding the Fourth Proportional to 21,939.40, 32,909.10 and 20,470.60

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Solution

The fourth proportional to 21,939.40, 32,909.10 and 20,470.60 is: 30,705.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.40 : 32,909.10 = 20,470.60 : x
  2. Step 2: Convert to fraction form
    21,939.40/32,909.10 = 20,470.60/x
  3. Step 3: Cross multiply
    21,939.40x = 32,909.10 × 20,470.60
  4. Step 4: Simplify right side
    21,939.40x = 673,669,022.46
  5. Step 5: Solve for x
    x = 673,669,022.46/21,939.40
  6. Step 6: Final answer
    x = 30,705.90

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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.