Home / 11,715.20-16,166.65-6,409.90

Finding the Fourth Proportional to 11,715.20, 16,166.65 and 6,409.90

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Solution

The fourth proportional to 11,715.20, 16,166.65 and 6,409.90 is: 8,845.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,715.20 : 16,166.65 = 6,409.90 : x
  2. Step 2: Convert to fraction form
    11,715.20/16,166.65 = 6,409.90/x
  3. Step 3: Cross multiply
    11,715.20x = 16,166.65 × 6,409.90
  4. Step 4: Simplify right side
    11,715.20x = 103,626,609.84
  5. Step 5: Solve for x
    x = 103,626,609.84/11,715.20
  6. Step 6: Final answer
    x = 8,845.48

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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.