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Finding the Fourth Proportional to 19,980.25, 27,575.99 and 11,914.91

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Solution

The fourth proportional to 19,980.25, 27,575.99 and 11,914.91 is: 16,444.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.25 : 27,575.99 = 11,914.91 : x
  2. Step 2: Convert to fraction form
    19,980.25/27,575.99 = 11,914.91/x
  3. Step 3: Cross multiply
    19,980.25x = 27,575.99 × 11,914.91
  4. Step 4: Simplify right side
    19,980.25x = 328,565,439.01
  5. Step 5: Solve for x
    x = 328,565,439.01/19,980.25
  6. Step 6: Final answer
    x = 16,444.51

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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.