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Finding the Fourth Proportional to 18,578.34, 25,495.92 and 18,447.12

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Solution

The fourth proportional to 18,578.34, 25,495.92 and 18,447.12 is: 25,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.34 : 25,495.92 = 18,447.12 : x
  2. Step 2: Convert to fraction form
    18,578.34/25,495.92 = 18,447.12/x
  3. Step 3: Cross multiply
    18,578.34x = 25,495.92 × 18,447.12
  4. Step 4: Simplify right side
    18,578.34x = 470,326,295.75
  5. Step 5: Solve for x
    x = 470,326,295.75/18,578.34
  6. Step 6: Final answer
    x = 25,315.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.