Home / 15,351.49-21,183.86-8,635.78

Finding the Fourth Proportional to 15,351.49, 21,183.86 and 8,635.78

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Solution

The fourth proportional to 15,351.49, 21,183.86 and 8,635.78 is: 11,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.49 : 21,183.86 = 8,635.78 : x
  2. Step 2: Convert to fraction form
    15,351.49/21,183.86 = 8,635.78/x
  3. Step 3: Cross multiply
    15,351.49x = 21,183.86 × 8,635.78
  4. Step 4: Simplify right side
    15,351.49x = 182,939,123.14
  5. Step 5: Solve for x
    x = 182,939,123.14/15,351.49
  6. Step 6: Final answer
    x = 11,916.70

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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.