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Finding the Fourth Proportional to 12,396.66, 18,585.90 and 7,959.33

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Solution

The fourth proportional to 12,396.66, 18,585.90 and 7,959.33 is: 11,933.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,396.66 : 18,585.90 = 7,959.33 : x
  2. Step 2: Convert to fraction form
    12,396.66/18,585.90 = 7,959.33/x
  3. Step 3: Cross multiply
    12,396.66x = 18,585.90 × 7,959.33
  4. Step 4: Simplify right side
    12,396.66x = 147,931,311.45
  5. Step 5: Solve for x
    x = 147,931,311.45/12,396.66
  6. Step 6: Final answer
    x = 11,933.16

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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.