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Finding the Fourth Proportional to 15,012.79, 20,693.79 and 11,821.03

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Solution

The fourth proportional to 15,012.79, 20,693.79 and 11,821.03 is: 16,294.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.79 : 20,693.79 = 11,821.03 : x
  2. Step 2: Convert to fraction form
    15,012.79/20,693.79 = 11,821.03/x
  3. Step 3: Cross multiply
    15,012.79x = 20,693.79 × 11,821.03
  4. Step 4: Simplify right side
    15,012.79x = 244,621,912.40
  5. Step 5: Solve for x
    x = 244,621,912.40/15,012.79
  6. Step 6: Final answer
    x = 16,294.23

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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.