Home / 13,135.92-18,126.90-7,167.30

Finding the Fourth Proportional to 13,135.92, 18,126.90 and 7,167.30

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Solution

The fourth proportional to 13,135.92, 18,126.90 and 7,167.30 is: 9,890.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.92 : 18,126.90 = 7,167.30 : x
  2. Step 2: Convert to fraction form
    13,135.92/18,126.90 = 7,167.30/x
  3. Step 3: Cross multiply
    13,135.92x = 18,126.90 × 7,167.30
  4. Step 4: Simplify right side
    13,135.92x = 129,920,930.37
  5. Step 5: Solve for x
    x = 129,920,930.37/13,135.92
  6. Step 6: Final answer
    x = 9,890.51

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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.