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Finding the Fourth Proportional to 18,116.16, 24,991.79 and 12,813.90

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Solution

The fourth proportional to 18,116.16, 24,991.79 and 12,813.90 is: 17,677.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116.16 : 24,991.79 = 12,813.90 : x
  2. Step 2: Convert to fraction form
    18,116.16/24,991.79 = 12,813.90/x
  3. Step 3: Cross multiply
    18,116.16x = 24,991.79 × 12,813.90
  4. Step 4: Simplify right side
    18,116.16x = 320,242,212.17
  5. Step 5: Solve for x
    x = 320,242,212.17/18,116.16
  6. Step 6: Final answer
    x = 17,677.16

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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.