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Finding the Fourth Proportional to 18,636.86, 25,713.77 and 12,965.24

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Solution

The fourth proportional to 18,636.86, 25,713.77 and 12,965.24 is: 17,888.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.86 : 25,713.77 = 12,965.24 : x
  2. Step 2: Convert to fraction form
    18,636.86/25,713.77 = 12,965.24/x
  3. Step 3: Cross multiply
    18,636.86x = 25,713.77 × 12,965.24
  4. Step 4: Simplify right side
    18,636.86x = 333,385,005.96
  5. Step 5: Solve for x
    x = 333,385,005.96/18,636.86
  6. Step 6: Final answer
    x = 17,888.48

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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.