Home / 20,528.05-30,790.66-12,631.84

Finding the Fourth Proportional to 20,528.05, 30,790.66 and 12,631.84

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Solution

The fourth proportional to 20,528.05, 30,790.66 and 12,631.84 is: 18,946.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.05 : 30,790.66 = 12,631.84 : x
  2. Step 2: Convert to fraction form
    20,528.05/30,790.66 = 12,631.84/x
  3. Step 3: Cross multiply
    20,528.05x = 30,790.66 × 12,631.84
  4. Step 4: Simplify right side
    20,528.05x = 388,942,690.61
  5. Step 5: Solve for x
    x = 388,942,690.61/20,528.05
  6. Step 6: Final answer
    x = 18,946.89

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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.