Home / 20,538.20-30,807.30-18,529.40

Finding the Fourth Proportional to 20,538.20, 30,807.30 and 18,529.40

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Solution

The fourth proportional to 20,538.20, 30,807.30 and 18,529.40 is: 27,794.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.20 : 30,807.30 = 18,529.40 : x
  2. Step 2: Convert to fraction form
    20,538.20/30,807.30 = 18,529.40/x
  3. Step 3: Cross multiply
    20,538.20x = 30,807.30 × 18,529.40
  4. Step 4: Simplify right side
    20,538.20x = 570,840,784.62
  5. Step 5: Solve for x
    x = 570,840,784.62/20,538.20
  6. Step 6: Final answer
    x = 27,794.10

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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.