Home / 12,731.88-17,575.92-8,490

Finding the Fourth Proportional to 12,731.88, 17,575.92 and 8,490

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Solution

The fourth proportional to 12,731.88, 17,575.92 and 8,490 is: 11,720.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,731.88 : 17,575.92 = 8,490 : x
  2. Step 2: Convert to fraction form
    12,731.88/17,575.92 = 8,490/x
  3. Step 3: Cross multiply
    12,731.88x = 17,575.92 × 8,490
  4. Step 4: Simplify right side
    12,731.88x = 149,219,560.80
  5. Step 5: Solve for x
    x = 149,219,560.80/12,731.88
  6. Step 6: Final answer
    x = 11,720.15

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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.