Home / 11,688.18-16,128.98-6,381.92

Finding the Fourth Proportional to 11,688.18, 16,128.98 and 6,381.92

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Solution

The fourth proportional to 11,688.18, 16,128.98 and 6,381.92 is: 8,806.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,688.18 : 16,128.98 = 6,381.92 : x
  2. Step 2: Convert to fraction form
    11,688.18/16,128.98 = 6,381.92/x
  3. Step 3: Cross multiply
    11,688.18x = 16,128.98 × 6,381.92
  4. Step 4: Simplify right side
    11,688.18x = 102,933,860.04
  5. Step 5: Solve for x
    x = 102,933,860.04/11,688.18
  6. Step 6: Final answer
    x = 8,806.66

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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.