Home / 15,518.89-21,416.56-8,804.80

Finding the Fourth Proportional to 15,518.89, 21,416.56 and 8,804.80

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Solution

The fourth proportional to 15,518.89, 21,416.56 and 8,804.80 is: 12,150.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.89 : 21,416.56 = 8,804.80 : x
  2. Step 2: Convert to fraction form
    15,518.89/21,416.56 = 8,804.80/x
  3. Step 3: Cross multiply
    15,518.89x = 21,416.56 × 8,804.80
  4. Step 4: Simplify right side
    15,518.89x = 188,568,527.49
  5. Step 5: Solve for x
    x = 188,568,527.49/15,518.89
  6. Step 6: Final answer
    x = 12,150.90

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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.