Home / 15,412.50-21,269.21-8,338.91

Finding the Fourth Proportional to 15,412.50, 21,269.21 and 8,338.91

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Solution

The fourth proportional to 15,412.50, 21,269.21 and 8,338.91 is: 11,507.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.50 : 21,269.21 = 8,338.91 : x
  2. Step 2: Convert to fraction form
    15,412.50/21,269.21 = 8,338.91/x
  3. Step 3: Cross multiply
    15,412.50x = 21,269.21 × 8,338.91
  4. Step 4: Simplify right side
    15,412.50x = 177,361,879.92
  5. Step 5: Solve for x
    x = 177,361,879.92/15,412.50
  6. Step 6: Final answer
    x = 11,507.66

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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.