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Finding the Fourth Proportional to 31,578.66, 47,367.96 and 9,391.98

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Solution

The fourth proportional to 31,578.66, 47,367.96 and 9,391.98 is: 14,087.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,578.66 : 47,367.96 = 9,391.98 : x
  2. Step 2: Convert to fraction form
    31,578.66/47,367.96 = 9,391.98/x
  3. Step 3: Cross multiply
    31,578.66x = 47,367.96 × 9,391.98
  4. Step 4: Simplify right side
    31,578.66x = 444,879,075.37
  5. Step 5: Solve for x
    x = 444,879,075.37/31,578.66
  6. Step 6: Final answer
    x = 14,087.97

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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.