Home / 20,919.69-31,379.57-14,707.49

Finding the Fourth Proportional to 20,919.69, 31,379.57 and 14,707.49

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Solution

The fourth proportional to 20,919.69, 31,379.57 and 14,707.49 is: 22,061.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.69 : 31,379.57 = 14,707.49 : x
  2. Step 2: Convert to fraction form
    20,919.69/31,379.57 = 14,707.49/x
  3. Step 3: Cross multiply
    20,919.69x = 31,379.57 × 14,707.49
  4. Step 4: Simplify right side
    20,919.69x = 461,514,481.54
  5. Step 5: Solve for x
    x = 461,514,481.54/20,919.69
  6. Step 6: Final answer
    x = 22,061.25

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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.