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Finding the Fourth Proportional to 14,391.96, 21,587.96 and 5,620.71

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Solution

The fourth proportional to 14,391.96, 21,587.96 and 5,620.71 is: 8,431.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,391.96 : 21,587.96 = 5,620.71 : x
  2. Step 2: Convert to fraction form
    14,391.96/21,587.96 = 5,620.71/x
  3. Step 3: Cross multiply
    14,391.96x = 21,587.96 × 5,620.71
  4. Step 4: Simplify right side
    14,391.96x = 121,339,662.65
  5. Step 5: Solve for x
    x = 121,339,662.65/14,391.96
  6. Step 6: Final answer
    x = 8,431.07

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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.