Home / 15,435.78-21,301.41-8,362.21

Finding the Fourth Proportional to 15,435.78, 21,301.41 and 8,362.21

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Solution

The fourth proportional to 15,435.78, 21,301.41 and 8,362.21 is: 11,539.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.78 : 21,301.41 = 8,362.21 : x
  2. Step 2: Convert to fraction form
    15,435.78/21,301.41 = 8,362.21/x
  3. Step 3: Cross multiply
    15,435.78x = 21,301.41 × 8,362.21
  4. Step 4: Simplify right side
    15,435.78x = 178,126,863.72
  5. Step 5: Solve for x
    x = 178,126,863.72/15,435.78
  6. Step 6: Final answer
    x = 11,539.87

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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.