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Finding the Fourth Proportional to 10,393.88, 15,590.78 and 3,379.72

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Solution

The fourth proportional to 10,393.88, 15,590.78 and 3,379.72 is: 5,069.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,393.88 : 15,590.78 = 3,379.72 : x
  2. Step 2: Convert to fraction form
    10,393.88/15,590.78 = 3,379.72/x
  3. Step 3: Cross multiply
    10,393.88x = 15,590.78 × 3,379.72
  4. Step 4: Simplify right side
    10,393.88x = 52,692,470.98
  5. Step 5: Solve for x
    x = 52,692,470.98/10,393.88
  6. Step 6: Final answer
    x = 5,069.57

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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.