Home / 12,115.68-18,054.60-11,719.28

Finding the Fourth Proportional to 12,115.68, 18,054.60 and 11,719.28

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Solution

The fourth proportional to 12,115.68, 18,054.60 and 11,719.28 is: 17,463.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.68 : 18,054.60 = 11,719.28 : x
  2. Step 2: Convert to fraction form
    12,115.68/18,054.60 = 11,719.28/x
  3. Step 3: Cross multiply
    12,115.68x = 18,054.60 × 11,719.28
  4. Step 4: Simplify right side
    12,115.68x = 211,586,913.88
  5. Step 5: Solve for x
    x = 211,586,913.88/12,115.68
  6. Step 6: Final answer
    x = 17,463.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.