Home / 13,220.84-18,237.97-8,682.87

Finding the Fourth Proportional to 13,220.84, 18,237.97 and 8,682.87

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Solution

The fourth proportional to 13,220.84, 18,237.97 and 8,682.87 is: 11,977.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.84 : 18,237.97 = 8,682.87 : x
  2. Step 2: Convert to fraction form
    13,220.84/18,237.97 = 8,682.87/x
  3. Step 3: Cross multiply
    13,220.84x = 18,237.97 × 8,682.87
  4. Step 4: Simplify right side
    13,220.84x = 158,357,935.06
  5. Step 5: Solve for x
    x = 158,357,935.06/13,220.84
  6. Step 6: Final answer
    x = 11,977.90

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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.