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Finding the Fourth Proportional to 21,064.88, 31,578.81 and 8,595.41

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Solution

The fourth proportional to 21,064.88, 31,578.81 and 8,595.41 is: 12,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,064.88 : 31,578.81 = 8,595.41 : x
  2. Step 2: Convert to fraction form
    21,064.88/31,578.81 = 8,595.41/x
  3. Step 3: Cross multiply
    21,064.88x = 31,578.81 × 8,595.41
  4. Step 4: Simplify right side
    21,064.88x = 271,432,661.37
  5. Step 5: Solve for x
    x = 271,432,661.37/21,064.88
  6. Step 6: Final answer
    x = 12,885.55

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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.