Home / 10,931.76-16,381.44-8,145.36

Finding the Fourth Proportional to 10,931.76, 16,381.44 and 8,145.36

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Solution

The fourth proportional to 10,931.76, 16,381.44 and 8,145.36 is: 12,205.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.76 : 16,381.44 = 8,145.36 : x
  2. Step 2: Convert to fraction form
    10,931.76/16,381.44 = 8,145.36/x
  3. Step 3: Cross multiply
    10,931.76x = 16,381.44 × 8,145.36
  4. Step 4: Simplify right side
    10,931.76x = 133,432,726.12
  5. Step 5: Solve for x
    x = 133,432,726.12/10,931.76
  6. Step 6: Final answer
    x = 12,205.97

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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.