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Finding the Fourth Proportional to 11,382.90, 15,718.11 and 7,141.11

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Solution

The fourth proportional to 11,382.90, 15,718.11 and 7,141.11 is: 9,860.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,382.90 : 15,718.11 = 7,141.11 : x
  2. Step 2: Convert to fraction form
    11,382.90/15,718.11 = 7,141.11/x
  3. Step 3: Cross multiply
    11,382.90x = 15,718.11 × 7,141.11
  4. Step 4: Simplify right side
    11,382.90x = 112,244,752.50
  5. Step 5: Solve for x
    x = 112,244,752.50/11,382.90
  6. Step 6: Final answer
    x = 9,860.82

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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.