Home / 18,719.08-28,054.38-7,612.78

Finding the Fourth Proportional to 18,719.08, 28,054.38 and 7,612.78

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Solution

The fourth proportional to 18,719.08, 28,054.38 and 7,612.78 is: 11,409.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.08 : 28,054.38 = 7,612.78 : x
  2. Step 2: Convert to fraction form
    18,719.08/28,054.38 = 7,612.78/x
  3. Step 3: Cross multiply
    18,719.08x = 28,054.38 × 7,612.78
  4. Step 4: Simplify right side
    18,719.08x = 213,571,822.98
  5. Step 5: Solve for x
    x = 213,571,822.98/18,719.08
  6. Step 6: Final answer
    x = 11,409.31

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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.