Home / 20,521.27-30,784.74-9,427.78

Finding the Fourth Proportional to 20,521.27, 30,784.74 and 9,427.78

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Solution

The fourth proportional to 20,521.27, 30,784.74 and 9,427.78 is: 14,142.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.27 : 30,784.74 = 9,427.78 : x
  2. Step 2: Convert to fraction form
    20,521.27/30,784.74 = 9,427.78/x
  3. Step 3: Cross multiply
    20,521.27x = 30,784.74 × 9,427.78
  4. Step 4: Simplify right side
    20,521.27x = 290,231,756.08
  5. Step 5: Solve for x
    x = 290,231,756.08/20,521.27
  6. Step 6: Final answer
    x = 14,142.97

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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.