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Finding the Fourth Proportional to 15,133.20, 20,861.06 and 11,940.99

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Solution

The fourth proportional to 15,133.20, 20,861.06 and 11,940.99 is: 16,460.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,133.20 : 20,861.06 = 11,940.99 : x
  2. Step 2: Convert to fraction form
    15,133.20/20,861.06 = 11,940.99/x
  3. Step 3: Cross multiply
    15,133.20x = 20,861.06 × 11,940.99
  4. Step 4: Simplify right side
    15,133.20x = 249,101,649.14
  5. Step 5: Solve for x
    x = 249,101,649.14/15,133.20
  6. Step 6: Final answer
    x = 16,460.61

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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.