Home / 18,992.08-28,616.80-15,777.20

Finding the Fourth Proportional to 18,992.08, 28,616.80 and 15,777.20

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Solution

The fourth proportional to 18,992.08, 28,616.80 and 15,777.20 is: 23,772.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.08 : 28,616.80 = 15,777.20 : x
  2. Step 2: Convert to fraction form
    18,992.08/28,616.80 = 15,777.20/x
  3. Step 3: Cross multiply
    18,992.08x = 28,616.80 × 15,777.20
  4. Step 4: Simplify right side
    18,992.08x = 451,492,976.96
  5. Step 5: Solve for x
    x = 451,492,976.96/18,992.08
  6. Step 6: Final answer
    x = 23,772.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.