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Finding the Fourth Proportional to 13,316.60, 20,003.70 and 9,428.60

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Solution

The fourth proportional to 13,316.60, 20,003.70 and 9,428.60 is: 14,163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.60 : 20,003.70 = 9,428.60 : x
  2. Step 2: Convert to fraction form
    13,316.60/20,003.70 = 9,428.60/x
  3. Step 3: Cross multiply
    13,316.60x = 20,003.70 × 9,428.60
  4. Step 4: Simplify right side
    13,316.60x = 188,606,885.82
  5. Step 5: Solve for x
    x = 188,606,885.82/13,316.60
  6. Step 6: Final answer
    x = 14,163.29

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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.