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Finding the Fourth Proportional to 12,358.49, 18,538.55 and 4,961.99

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Solution

The fourth proportional to 12,358.49, 18,538.55 and 4,961.99 is: 7,443.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,358.49 : 18,538.55 = 4,961.99 : x
  2. Step 2: Convert to fraction form
    12,358.49/18,538.55 = 4,961.99/x
  3. Step 3: Cross multiply
    12,358.49x = 18,538.55 × 4,961.99
  4. Step 4: Simplify right side
    12,358.49x = 91,987,982.21
  5. Step 5: Solve for x
    x = 91,987,982.21/12,358.49
  6. Step 6: Final answer
    x = 7,443.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.