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Finding the Fourth Proportional to 12,628.24, 18,919.74 and 7,695.28

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Solution

The fourth proportional to 12,628.24, 18,919.74 and 7,695.28 is: 11,529.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.24 : 18,919.74 = 7,695.28 : x
  2. Step 2: Convert to fraction form
    12,628.24/18,919.74 = 7,695.28/x
  3. Step 3: Cross multiply
    12,628.24x = 18,919.74 × 7,695.28
  4. Step 4: Simplify right side
    12,628.24x = 145,592,696.83
  5. Step 5: Solve for x
    x = 145,592,696.83/12,628.24
  6. Step 6: Final answer
    x = 11,529.14

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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.