Home / 13,106.08-18,085.82-7,137.80

Finding the Fourth Proportional to 13,106.08, 18,085.82 and 7,137.80

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Solution

The fourth proportional to 13,106.08, 18,085.82 and 7,137.80 is: 9,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.08 : 18,085.82 = 7,137.80 : x
  2. Step 2: Convert to fraction form
    13,106.08/18,085.82 = 7,137.80/x
  3. Step 3: Cross multiply
    13,106.08x = 18,085.82 × 7,137.80
  4. Step 4: Simplify right side
    13,106.08x = 129,092,893.41
  5. Step 5: Solve for x
    x = 129,092,893.41/13,106.08
  6. Step 6: Final answer
    x = 9,849.85

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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.