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Finding the Fourth Proportional to 19,990.86, 27,578.25 and 11,602.50

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Solution

The fourth proportional to 19,990.86, 27,578.25 and 11,602.50 is: 16,006.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.86 : 27,578.25 = 11,602.50 : x
  2. Step 2: Convert to fraction form
    19,990.86/27,578.25 = 11,602.50/x
  3. Step 3: Cross multiply
    19,990.86x = 27,578.25 × 11,602.50
  4. Step 4: Simplify right side
    19,990.86x = 319,976,645.63
  5. Step 5: Solve for x
    x = 319,976,645.63/19,990.86
  6. Step 6: Final answer
    x = 16,006.15

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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.