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Finding the Fourth Proportional to 20,400.30, 30,594.78 and 5,605.65

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Solution

The fourth proportional to 20,400.30, 30,594.78 and 5,605.65 is: 8,406.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.30 : 30,594.78 = 5,605.65 : x
  2. Step 2: Convert to fraction form
    20,400.30/30,594.78 = 5,605.65/x
  3. Step 3: Cross multiply
    20,400.30x = 30,594.78 × 5,605.65
  4. Step 4: Simplify right side
    20,400.30x = 171,503,628.51
  5. Step 5: Solve for x
    x = 171,503,628.51/20,400.30
  6. Step 6: Final answer
    x = 8,406.92

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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.