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Finding the Fourth Proportional to 12,243.87, 18,390.42 and 10,699.99

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Solution

The fourth proportional to 12,243.87, 18,390.42 and 10,699.99 is: 16,071.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.87 : 18,390.42 = 10,699.99 : x
  2. Step 2: Convert to fraction form
    12,243.87/18,390.42 = 10,699.99/x
  3. Step 3: Cross multiply
    12,243.87x = 18,390.42 × 10,699.99
  4. Step 4: Simplify right side
    12,243.87x = 196,777,264.12
  5. Step 5: Solve for x
    x = 196,777,264.12/12,243.87
  6. Step 6: Final answer
    x = 16,071.49

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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.