Home / 15,345.78-21,198.68-11,853.87

Finding the Fourth Proportional to 15,345.78, 21,198.68 and 11,853.87

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Solution

The fourth proportional to 15,345.78, 21,198.68 and 11,853.87 is: 16,374.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.78 : 21,198.68 = 11,853.87 : x
  2. Step 2: Convert to fraction form
    15,345.78/21,198.68 = 11,853.87/x
  3. Step 3: Cross multiply
    15,345.78x = 21,198.68 × 11,853.87
  4. Step 4: Simplify right side
    15,345.78x = 251,286,231.63
  5. Step 5: Solve for x
    x = 251,286,231.63/15,345.78
  6. Step 6: Final answer
    x = 16,374.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.