Home / 13,135.20-18,125.91-7,166.82

Finding the Fourth Proportional to 13,135.20, 18,125.91 and 7,166.82

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Solution

The fourth proportional to 13,135.20, 18,125.91 and 7,166.82 is: 9,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.20 : 18,125.91 = 7,166.82 : x
  2. Step 2: Convert to fraction form
    13,135.20/18,125.91 = 7,166.82/x
  3. Step 3: Cross multiply
    13,135.20x = 18,125.91 × 7,166.82
  4. Step 4: Simplify right side
    13,135.20x = 129,905,134.31
  5. Step 5: Solve for x
    x = 129,905,134.31/13,135.20
  6. Step 6: Final answer
    x = 9,889.85

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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.