Home / 20,261.40-30,378.90-18,187.80

Finding the Fourth Proportional to 20,261.40, 30,378.90 and 18,187.80

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Solution

The fourth proportional to 20,261.40, 30,378.90 and 18,187.80 is: 27,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.40 : 30,378.90 = 18,187.80 : x
  2. Step 2: Convert to fraction form
    20,261.40/30,378.90 = 18,187.80/x
  3. Step 3: Cross multiply
    20,261.40x = 30,378.90 × 18,187.80
  4. Step 4: Simplify right side
    20,261.40x = 552,525,357.42
  5. Step 5: Solve for x
    x = 552,525,357.42/20,261.40
  6. Step 6: Final answer
    x = 27,269.85

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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.