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Finding the Fourth Proportional to 19,326.61, 28,980.92 and 11,323.79

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Solution

The fourth proportional to 19,326.61, 28,980.92 and 11,323.79 is: 16,980.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,326.61 : 28,980.92 = 11,323.79 : x
  2. Step 2: Convert to fraction form
    19,326.61/28,980.92 = 11,323.79/x
  3. Step 3: Cross multiply
    19,326.61x = 28,980.92 × 11,323.79
  4. Step 4: Simplify right side
    19,326.61x = 328,173,852.09
  5. Step 5: Solve for x
    x = 328,173,852.09/19,326.61
  6. Step 6: Final answer
    x = 16,980.41

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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.