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Finding the Fourth Proportional to 8,954.99, 12,358.01 and 5,418.20

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Solution

The fourth proportional to 8,954.99, 12,358.01 and 5,418.20 is: 7,477.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,954.99 : 12,358.01 = 5,418.20 : x
  2. Step 2: Convert to fraction form
    8,954.99/12,358.01 = 5,418.20/x
  3. Step 3: Cross multiply
    8,954.99x = 12,358.01 × 5,418.20
  4. Step 4: Simplify right side
    8,954.99x = 66,958,173.59
  5. Step 5: Solve for x
    x = 66,958,173.59/8,954.99
  6. Step 6: Final answer
    x = 7,477.20

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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.