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Finding the Fourth Proportional to 19,758.87, 29,612.16 and 10,379.71

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Solution

The fourth proportional to 19,758.87, 29,612.16 and 10,379.71 is: 15,555.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,758.87 : 29,612.16 = 10,379.71 : x
  2. Step 2: Convert to fraction form
    19,758.87/29,612.16 = 10,379.71/x
  3. Step 3: Cross multiply
    19,758.87x = 29,612.16 × 10,379.71
  4. Step 4: Simplify right side
    19,758.87x = 307,365,633.27
  5. Step 5: Solve for x
    x = 307,365,633.27/19,758.87
  6. Step 6: Final answer
    x = 15,555.83

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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.