Home / 13,187.91-19,781.80-5,396.72

Finding the Fourth Proportional to 13,187.91, 19,781.80 and 5,396.72

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Solution

The fourth proportional to 13,187.91, 19,781.80 and 5,396.72 is: 8,095.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.91 : 19,781.80 = 5,396.72 : x
  2. Step 2: Convert to fraction form
    13,187.91/19,781.80 = 5,396.72/x
  3. Step 3: Cross multiply
    13,187.91x = 19,781.80 × 5,396.72
  4. Step 4: Simplify right side
    13,187.91x = 106,756,709.80
  5. Step 5: Solve for x
    x = 106,756,709.80/13,187.91
  6. Step 6: Final answer
    x = 8,095.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.