Home / 11,123.20-15,351.64-6,406.56

Finding the Fourth Proportional to 11,123.20, 15,351.64 and 6,406.56

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Solution

The fourth proportional to 11,123.20, 15,351.64 and 6,406.56 is: 8,841.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123.20 : 15,351.64 = 6,406.56 : x
  2. Step 2: Convert to fraction form
    11,123.20/15,351.64 = 6,406.56/x
  3. Step 3: Cross multiply
    11,123.20x = 15,351.64 × 6,406.56
  4. Step 4: Simplify right side
    11,123.20x = 98,351,202.76
  5. Step 5: Solve for x
    x = 98,351,202.76/11,123.20
  6. Step 6: Final answer
    x = 8,841.99

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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.