Home / 12,618.72-18,928.08-7,992

Finding the Fourth Proportional to 12,618.72, 18,928.08 and 7,992

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Solution

The fourth proportional to 12,618.72, 18,928.08 and 7,992 is: 11,988.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.72 : 18,928.08 = 7,992 : x
  2. Step 2: Convert to fraction form
    12,618.72/18,928.08 = 7,992/x
  3. Step 3: Cross multiply
    12,618.72x = 18,928.08 × 7,992
  4. Step 4: Simplify right side
    12,618.72x = 151,273,215.36
  5. Step 5: Solve for x
    x = 151,273,215.36/12,618.72
  6. Step 6: Final answer
    x = 11,988.00

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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.