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Finding the Fourth Proportional to 11,690.56, 16,126.98 and 7,913.86

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Solution

The fourth proportional to 11,690.56, 16,126.98 and 7,913.86 is: 10,917.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,690.56 : 16,126.98 = 7,913.86 : x
  2. Step 2: Convert to fraction form
    11,690.56/16,126.98 = 7,913.86/x
  3. Step 3: Cross multiply
    11,690.56x = 16,126.98 × 7,913.86
  4. Step 4: Simplify right side
    11,690.56x = 127,626,661.94
  5. Step 5: Solve for x
    x = 127,626,661.94/11,690.56
  6. Step 6: Final answer
    x = 10,917.07

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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.