Home / 13,187.76-18,199.02-7,137.96

Finding the Fourth Proportional to 13,187.76, 18,199.02 and 7,137.96

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Solution

The fourth proportional to 13,187.76, 18,199.02 and 7,137.96 is: 9,850.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.76 : 18,199.02 = 7,137.96 : x
  2. Step 2: Convert to fraction form
    13,187.76/18,199.02 = 7,137.96/x
  3. Step 3: Cross multiply
    13,187.76x = 18,199.02 × 7,137.96
  4. Step 4: Simplify right side
    13,187.76x = 129,903,876.80
  5. Step 5: Solve for x
    x = 129,903,876.80/13,187.76
  6. Step 6: Final answer
    x = 9,850.34

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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.