Home / 20,521.96-30,784.68-6,478.23

Finding the Fourth Proportional to 20,521.96, 30,784.68 and 6,478.23

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Solution

The fourth proportional to 20,521.96, 30,784.68 and 6,478.23 is: 9,717.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.96 : 30,784.68 = 6,478.23 : x
  2. Step 2: Convert to fraction form
    20,521.96/30,784.68 = 6,478.23/x
  3. Step 3: Cross multiply
    20,521.96x = 30,784.68 × 6,478.23
  4. Step 4: Simplify right side
    20,521.96x = 199,430,067.40
  5. Step 5: Solve for x
    x = 199,430,067.40/20,521.96
  6. Step 6: Final answer
    x = 9,717.89

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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.