Home / 8,991.30-13,478.75-3,143.81

Finding the Fourth Proportional to 8,991.30, 13,478.75 and 3,143.81

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Solution

The fourth proportional to 8,991.30, 13,478.75 and 3,143.81 is: 4,712.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.30 : 13,478.75 = 3,143.81 : x
  2. Step 2: Convert to fraction form
    8,991.30/13,478.75 = 3,143.81/x
  3. Step 3: Cross multiply
    8,991.30x = 13,478.75 × 3,143.81
  4. Step 4: Simplify right side
    8,991.30x = 42,374,676.49
  5. Step 5: Solve for x
    x = 42,374,676.49/8,991.30
  6. Step 6: Final answer
    x = 4,712.85

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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.