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Finding the Fourth Proportional to 15,757.70, 21,745.35 and 8,587.68

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Solution

The fourth proportional to 15,757.70, 21,745.35 and 8,587.68 is: 11,850.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,757.70 : 21,745.35 = 8,587.68 : x
  2. Step 2: Convert to fraction form
    15,757.70/21,745.35 = 8,587.68/x
  3. Step 3: Cross multiply
    15,757.70x = 21,745.35 × 8,587.68
  4. Step 4: Simplify right side
    15,757.70x = 186,742,107.29
  5. Step 5: Solve for x
    x = 186,742,107.29/15,757.70
  6. Step 6: Final answer
    x = 11,850.85

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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.