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Finding the Fourth Proportional to 18,418.22, 25,410.48 and 12,048.45

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Solution

The fourth proportional to 18,418.22, 25,410.48 and 12,048.45 is: 16,622.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.22 : 25,410.48 = 12,048.45 : x
  2. Step 2: Convert to fraction form
    18,418.22/25,410.48 = 12,048.45/x
  3. Step 3: Cross multiply
    18,418.22x = 25,410.48 × 12,048.45
  4. Step 4: Simplify right side
    18,418.22x = 306,156,897.76
  5. Step 5: Solve for x
    x = 306,156,897.76/18,418.22
  6. Step 6: Final answer
    x = 16,622.50

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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.