Home / 19,145.70-28,719.93-5,105.66

Finding the Fourth Proportional to 19,145.70, 28,719.93 and 5,105.66

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Solution

The fourth proportional to 19,145.70, 28,719.93 and 5,105.66 is: 7,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.70 : 28,719.93 = 5,105.66 : x
  2. Step 2: Convert to fraction form
    19,145.70/28,719.93 = 5,105.66/x
  3. Step 3: Cross multiply
    19,145.70x = 28,719.93 × 5,105.66
  4. Step 4: Simplify right side
    19,145.70x = 146,634,132.59
  5. Step 5: Solve for x
    x = 146,634,132.59/19,145.70
  6. Step 6: Final answer
    x = 7,658.85

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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.