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Finding the Fourth Proportional to 18,415.80, 25,404.36 and 12,046.14

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Solution

The fourth proportional to 18,415.80, 25,404.36 and 12,046.14 is: 16,617.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.80 : 25,404.36 = 12,046.14 : x
  2. Step 2: Convert to fraction form
    18,415.80/25,404.36 = 12,046.14/x
  3. Step 3: Cross multiply
    18,415.80x = 25,404.36 × 12,046.14
  4. Step 4: Simplify right side
    18,415.80x = 306,024,477.17
  5. Step 5: Solve for x
    x = 306,024,477.17/18,415.80
  6. Step 6: Final answer
    x = 16,617.50

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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.