Home / 8,954.96-12,358.38-5,178.80

Finding the Fourth Proportional to 8,954.96, 12,358.38 and 5,178.80

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Solution

The fourth proportional to 8,954.96, 12,358.38 and 5,178.80 is: 7,147.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,954.96 : 12,358.38 = 5,178.80 : x
  2. Step 2: Convert to fraction form
    8,954.96/12,358.38 = 5,178.80/x
  3. Step 3: Cross multiply
    8,954.96x = 12,358.38 × 5,178.80
  4. Step 4: Simplify right side
    8,954.96x = 64,001,578.34
  5. Step 5: Solve for x
    x = 64,001,578.34/8,954.96
  6. Step 6: Final answer
    x = 7,147.05

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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.