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Finding the Fourth Proportional to 19,992.40, 27,579.72 and 12,924.88

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Solution

The fourth proportional to 19,992.40, 27,579.72 and 12,924.88 is: 17,830.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.40 : 27,579.72 = 12,924.88 : x
  2. Step 2: Convert to fraction form
    19,992.40/27,579.72 = 12,924.88/x
  3. Step 3: Cross multiply
    19,992.40x = 27,579.72 × 12,924.88
  4. Step 4: Simplify right side
    19,992.40x = 356,464,571.43
  5. Step 5: Solve for x
    x = 356,464,571.43/19,992.40
  6. Step 6: Final answer
    x = 17,830.00

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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.