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Finding the Fourth Proportional to 18,813.98, 25,958.12 and 11,640.45

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Solution

The fourth proportional to 18,813.98, 25,958.12 and 11,640.45 is: 16,060.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.98 : 25,958.12 = 11,640.45 : x
  2. Step 2: Convert to fraction form
    18,813.98/25,958.12 = 11,640.45/x
  3. Step 3: Cross multiply
    18,813.98x = 25,958.12 × 11,640.45
  4. Step 4: Simplify right side
    18,813.98x = 302,164,068.16
  5. Step 5: Solve for x
    x = 302,164,068.16/18,813.98
  6. Step 6: Final answer
    x = 16,060.62

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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.