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Finding the Fourth Proportional to 15,758.17, 21,745.41 and 9,789.73

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Solution

The fourth proportional to 15,758.17, 21,745.41 and 9,789.73 is: 13,509.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,758.17 : 21,745.41 = 9,789.73 : x
  2. Step 2: Convert to fraction form
    15,758.17/21,745.41 = 9,789.73/x
  3. Step 3: Cross multiply
    15,758.17x = 21,745.41 × 9,789.73
  4. Step 4: Simplify right side
    15,758.17x = 212,881,692.64
  5. Step 5: Solve for x
    x = 212,881,692.64/15,758.17
  6. Step 6: Final answer
    x = 13,509.29

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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.