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Finding the Fourth Proportional to 15,144.96, 20,904.96 and 10,178.56

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Solution

The fourth proportional to 15,144.96, 20,904.96 and 10,178.56 is: 14,049.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.96 : 20,904.96 = 10,178.56 : x
  2. Step 2: Convert to fraction form
    15,144.96/20,904.96 = 10,178.56/x
  3. Step 3: Cross multiply
    15,144.96x = 20,904.96 × 10,178.56
  4. Step 4: Simplify right side
    15,144.96x = 212,782,389.66
  5. Step 5: Solve for x
    x = 212,782,389.66/15,144.96
  6. Step 6: Final answer
    x = 14,049.72

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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.