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Finding the Fourth Proportional to 11,588.71, 15,991.22 and 7,112.65

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Solution

The fourth proportional to 11,588.71, 15,991.22 and 7,112.65 is: 9,814.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,588.71 : 15,991.22 = 7,112.65 : x
  2. Step 2: Convert to fraction form
    11,588.71/15,991.22 = 7,112.65/x
  3. Step 3: Cross multiply
    11,588.71x = 15,991.22 × 7,112.65
  4. Step 4: Simplify right side
    11,588.71x = 113,739,950.93
  5. Step 5: Solve for x
    x = 113,739,950.93/11,588.71
  6. Step 6: Final answer
    x = 9,814.72

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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.