Home / 13,355.26-18,429.78-7,691.83

Finding the Fourth Proportional to 13,355.26, 18,429.78 and 7,691.83

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Solution

The fourth proportional to 13,355.26, 18,429.78 and 7,691.83 is: 10,614.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.26 : 18,429.78 = 7,691.83 : x
  2. Step 2: Convert to fraction form
    13,355.26/18,429.78 = 7,691.83/x
  3. Step 3: Cross multiply
    13,355.26x = 18,429.78 × 7,691.83
  4. Step 4: Simplify right side
    13,355.26x = 141,758,734.70
  5. Step 5: Solve for x
    x = 141,758,734.70/13,355.26
  6. Step 6: Final answer
    x = 10,614.45

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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.