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Finding the Fourth Proportional to 20,379.36, 30,569.92 and 5,587.92

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Solution

The fourth proportional to 20,379.36, 30,569.92 and 5,587.92 is: 8,382.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.36 : 30,569.92 = 5,587.92 : x
  2. Step 2: Convert to fraction form
    20,379.36/30,569.92 = 5,587.92/x
  3. Step 3: Cross multiply
    20,379.36x = 30,569.92 × 5,587.92
  4. Step 4: Simplify right side
    20,379.36x = 170,822,267.37
  5. Step 5: Solve for x
    x = 170,822,267.37/20,379.36
  6. Step 6: Final answer
    x = 8,382.12

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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.