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Finding the Fourth Proportional to 10,372.88, 15,561.99 and 2,977.88

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Solution

The fourth proportional to 10,372.88, 15,561.99 and 2,977.88 is: 4,467.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,372.88 : 15,561.99 = 2,977.88 : x
  2. Step 2: Convert to fraction form
    10,372.88/15,561.99 = 2,977.88/x
  3. Step 3: Cross multiply
    10,372.88x = 15,561.99 × 2,977.88
  4. Step 4: Simplify right side
    10,372.88x = 46,341,738.78
  5. Step 5: Solve for x
    x = 46,341,738.78/10,372.88
  6. Step 6: Final answer
    x = 4,467.59

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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.