Home / 13,719.74-18,934.78-7,751.78

Finding the Fourth Proportional to 13,719.74, 18,934.78 and 7,751.78

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Solution

The fourth proportional to 13,719.74, 18,934.78 and 7,751.78 is: 10,698.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.74 : 18,934.78 = 7,751.78 : x
  2. Step 2: Convert to fraction form
    13,719.74/18,934.78 = 7,751.78/x
  3. Step 3: Cross multiply
    13,719.74x = 18,934.78 × 7,751.78
  4. Step 4: Simplify right side
    13,719.74x = 146,778,248.91
  5. Step 5: Solve for x
    x = 146,778,248.91/13,719.74
  6. Step 6: Final answer
    x = 10,698.33

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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.