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Finding the Fourth Proportional to 9,328.72, 12,859.72 and 6,179.44

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Solution

The fourth proportional to 9,328.72, 12,859.72 and 6,179.44 is: 8,518.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,328.72 : 12,859.72 = 6,179.44 : x
  2. Step 2: Convert to fraction form
    9,328.72/12,859.72 = 6,179.44/x
  3. Step 3: Cross multiply
    9,328.72x = 12,859.72 × 6,179.44
  4. Step 4: Simplify right side
    9,328.72x = 79,465,868.16
  5. Step 5: Solve for x
    x = 79,465,868.16/9,328.72
  6. Step 6: Final answer
    x = 8,518.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.