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Finding the Fourth Proportional to 13,491.84, 18,621.72 and 8,767.92

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Solution

The fourth proportional to 13,491.84, 18,621.72 and 8,767.92 is: 12,101.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.84 : 18,621.72 = 8,767.92 : x
  2. Step 2: Convert to fraction form
    13,491.84/18,621.72 = 8,767.92/x
  3. Step 3: Cross multiply
    13,491.84x = 18,621.72 × 8,767.92
  4. Step 4: Simplify right side
    13,491.84x = 163,273,751.22
  5. Step 5: Solve for x
    x = 163,273,751.22/13,491.84
  6. Step 6: Final answer
    x = 12,101.67

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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.