Home / 8,954.21-12,356.79-5,416.40

Finding the Fourth Proportional to 8,954.21, 12,356.79 and 5,416.40

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Solution

The fourth proportional to 8,954.21, 12,356.79 and 5,416.40 is: 7,474.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,954.21 : 12,356.79 = 5,416.40 : x
  2. Step 2: Convert to fraction form
    8,954.21/12,356.79 = 5,416.40/x
  3. Step 3: Cross multiply
    8,954.21x = 12,356.79 × 5,416.40
  4. Step 4: Simplify right side
    8,954.21x = 66,929,327.94
  5. Step 5: Solve for x
    x = 66,929,327.94/8,954.21
  6. Step 6: Final answer
    x = 7,474.62

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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.