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Finding the Fourth Proportional to 11,390.73, 15,710.72 and 8,364.90

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Solution

The fourth proportional to 11,390.73, 15,710.72 and 8,364.90 is: 11,537.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.73 : 15,710.72 = 8,364.90 : x
  2. Step 2: Convert to fraction form
    11,390.73/15,710.72 = 8,364.90/x
  3. Step 3: Cross multiply
    11,390.73x = 15,710.72 × 8,364.90
  4. Step 4: Simplify right side
    11,390.73x = 131,418,559.90
  5. Step 5: Solve for x
    x = 131,418,559.90/11,390.73
  6. Step 6: Final answer
    x = 11,537.33

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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.