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Finding the Fourth Proportional to 13,487.79, 20,231.69 and 5,696.67

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Solution

The fourth proportional to 13,487.79, 20,231.69 and 5,696.67 is: 8,545.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.79 : 20,231.69 = 5,696.67 : x
  2. Step 2: Convert to fraction form
    13,487.79/20,231.69 = 5,696.67/x
  3. Step 3: Cross multiply
    13,487.79x = 20,231.69 × 5,696.67
  4. Step 4: Simplify right side
    13,487.79x = 115,253,232.99
  5. Step 5: Solve for x
    x = 115,253,232.99/13,487.79
  6. Step 6: Final answer
    x = 8,545.01

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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.