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Finding the Fourth Proportional to 13,395.68, 18,484.80 and 7,731.44

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Solution

The fourth proportional to 13,395.68, 18,484.80 and 7,731.44 is: 10,668.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.68 : 18,484.80 = 7,731.44 : x
  2. Step 2: Convert to fraction form
    13,395.68/18,484.80 = 7,731.44/x
  3. Step 3: Cross multiply
    13,395.68x = 18,484.80 × 7,731.44
  4. Step 4: Simplify right side
    13,395.68x = 142,914,122.11
  5. Step 5: Solve for x
    x = 142,914,122.11/13,395.68
  6. Step 6: Final answer
    x = 10,668.67

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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.