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Finding the Fourth Proportional to 20,379.63, 30,569.49 and 5,588.76

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Solution

The fourth proportional to 20,379.63, 30,569.49 and 5,588.76 is: 8,383.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.63 : 30,569.49 = 5,588.76 : x
  2. Step 2: Convert to fraction form
    20,379.63/30,569.49 = 5,588.76/x
  3. Step 3: Cross multiply
    20,379.63x = 30,569.49 × 5,588.76
  4. Step 4: Simplify right side
    20,379.63x = 170,845,542.93
  5. Step 5: Solve for x
    x = 170,845,542.93/20,379.63
  6. Step 6: Final answer
    x = 8,383.15

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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.