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Finding the Fourth Proportional to 11,366.69, 15,686.78 and 6,890.85

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Solution

The fourth proportional to 11,366.69, 15,686.78 and 6,890.85 is: 9,509.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,366.69 : 15,686.78 = 6,890.85 : x
  2. Step 2: Convert to fraction form
    11,366.69/15,686.78 = 6,890.85/x
  3. Step 3: Cross multiply
    11,366.69x = 15,686.78 × 6,890.85
  4. Step 4: Simplify right side
    11,366.69x = 108,095,213.51
  5. Step 5: Solve for x
    x = 108,095,213.51/11,366.69
  6. Step 6: Final answer
    x = 9,509.83

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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.