Home / 13,611.65-20,384.66-7,750.49

Finding the Fourth Proportional to 13,611.65, 20,384.66 and 7,750.49

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Solution

The fourth proportional to 13,611.65, 20,384.66 and 7,750.49 is: 11,607.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.65 : 20,384.66 = 7,750.49 : x
  2. Step 2: Convert to fraction form
    13,611.65/20,384.66 = 7,750.49/x
  3. Step 3: Cross multiply
    13,611.65x = 20,384.66 × 7,750.49
  4. Step 4: Simplify right side
    13,611.65x = 157,991,020.94
  5. Step 5: Solve for x
    x = 157,991,020.94/13,611.65
  6. Step 6: Final answer
    x = 11,607.05

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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.