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Finding the Fourth Proportional to 18,992.63, 28,416.65 and 11,468.49

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Solution

The fourth proportional to 18,992.63, 28,416.65 and 11,468.49 is: 17,159.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.63 : 28,416.65 = 11,468.49 : x
  2. Step 2: Convert to fraction form
    18,992.63/28,416.65 = 11,468.49/x
  3. Step 3: Cross multiply
    18,992.63x = 28,416.65 × 11,468.49
  4. Step 4: Simplify right side
    18,992.63x = 325,896,009.02
  5. Step 5: Solve for x
    x = 325,896,009.02/18,992.63
  6. Step 6: Final answer
    x = 17,159.08

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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.