Home / 13,187.12-18,196.52-7,881.08

Finding the Fourth Proportional to 13,187.12, 18,196.52 and 7,881.08

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Solution

The fourth proportional to 13,187.12, 18,196.52 and 7,881.08 is: 10,874.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.12 : 18,196.52 = 7,881.08 : x
  2. Step 2: Convert to fraction form
    13,187.12/18,196.52 = 7,881.08/x
  3. Step 3: Cross multiply
    13,187.12x = 18,196.52 × 7,881.08
  4. Step 4: Simplify right side
    13,187.12x = 143,408,229.84
  5. Step 5: Solve for x
    x = 143,408,229.84/13,187.12
  6. Step 6: Final answer
    x = 10,874.87

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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.