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Finding the Fourth Proportional to 11,486.54, 15,853.16 and 7,012.90

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Solution

The fourth proportional to 11,486.54, 15,853.16 and 7,012.90 is: 9,678.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,486.54 : 15,853.16 = 7,012.90 : x
  2. Step 2: Convert to fraction form
    11,486.54/15,853.16 = 7,012.90/x
  3. Step 3: Cross multiply
    11,486.54x = 15,853.16 × 7,012.90
  4. Step 4: Simplify right side
    11,486.54x = 111,176,625.76
  5. Step 5: Solve for x
    x = 111,176,625.76/11,486.54
  6. Step 6: Final answer
    x = 9,678.86

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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.