Home / 15,478.49-21,361.64-8,765.30

Finding the Fourth Proportional to 15,478.49, 21,361.64 and 8,765.30

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Solution

The fourth proportional to 15,478.49, 21,361.64 and 8,765.30 is: 12,096.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.49 : 21,361.64 = 8,765.30 : x
  2. Step 2: Convert to fraction form
    15,478.49/21,361.64 = 8,765.30/x
  3. Step 3: Cross multiply
    15,478.49x = 21,361.64 × 8,765.30
  4. Step 4: Simplify right side
    15,478.49x = 187,241,183.09
  5. Step 5: Solve for x
    x = 187,241,183.09/15,478.49
  6. Step 6: Final answer
    x = 12,096.86

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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.