Home / 13,631.90-18,800.35-9,389.72

Finding the Fourth Proportional to 13,631.90, 18,800.35 and 9,389.72

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Solution

The fourth proportional to 13,631.90, 18,800.35 and 9,389.72 is: 12,949.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.90 : 18,800.35 = 9,389.72 : x
  2. Step 2: Convert to fraction form
    13,631.90/18,800.35 = 9,389.72/x
  3. Step 3: Cross multiply
    13,631.90x = 18,800.35 × 9,389.72
  4. Step 4: Simplify right side
    13,631.90x = 176,530,098.75
  5. Step 5: Solve for x
    x = 176,530,098.75/13,631.90
  6. Step 6: Final answer
    x = 12,949.78

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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.