Home / 21,369.72-29,487.60-11,937

Finding the Fourth Proportional to 21,369.72, 29,487.60 and 11,937

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Solution

The fourth proportional to 21,369.72, 29,487.60 and 11,937 is: 16,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,369.72 : 29,487.60 = 11,937 : x
  2. Step 2: Convert to fraction form
    21,369.72/29,487.60 = 11,937/x
  3. Step 3: Cross multiply
    21,369.72x = 29,487.60 × 11,937
  4. Step 4: Simplify right side
    21,369.72x = 351,993,481.20
  5. Step 5: Solve for x
    x = 351,993,481.20/21,369.72
  6. Step 6: Final answer
    x = 16,471.60

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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.