Home / 21,289.72-31,934.60-7,435.48

Finding the Fourth Proportional to 21,289.72, 31,934.60 and 7,435.48

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Solution

The fourth proportional to 21,289.72, 31,934.60 and 7,435.48 is: 11,153.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.72 : 31,934.60 = 7,435.48 : x
  2. Step 2: Convert to fraction form
    21,289.72/31,934.60 = 7,435.48/x
  3. Step 3: Cross multiply
    21,289.72x = 31,934.60 × 7,435.48
  4. Step 4: Simplify right side
    21,289.72x = 237,449,079.61
  5. Step 5: Solve for x
    x = 237,449,079.61/21,289.72
  6. Step 6: Final answer
    x = 11,153.23

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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.