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Finding the Fourth Proportional to 11,419.47, 15,758.95 and 6,383.89

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Solution

The fourth proportional to 11,419.47, 15,758.95 and 6,383.89 is: 8,809.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,419.47 : 15,758.95 = 6,383.89 : x
  2. Step 2: Convert to fraction form
    11,419.47/15,758.95 = 6,383.89/x
  3. Step 3: Cross multiply
    11,419.47x = 15,758.95 × 6,383.89
  4. Step 4: Simplify right side
    11,419.47x = 100,603,371.40
  5. Step 5: Solve for x
    x = 100,603,371.40/11,419.47
  6. Step 6: Final answer
    x = 8,809.81

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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.