Home / 21,299.72-31,949.58-7,445.48

Finding the Fourth Proportional to 21,299.72, 31,949.58 and 7,445.48

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Solution

The fourth proportional to 21,299.72, 31,949.58 and 7,445.48 is: 11,168.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.72 : 31,949.58 = 7,445.48 : x
  2. Step 2: Convert to fraction form
    21,299.72/31,949.58 = 7,445.48/x
  3. Step 3: Cross multiply
    21,299.72x = 31,949.58 × 7,445.48
  4. Step 4: Simplify right side
    21,299.72x = 237,879,958.90
  5. Step 5: Solve for x
    x = 237,879,958.90/21,299.72
  6. Step 6: Final answer
    x = 11,168.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.