Home / 13,612.70-20,409.44-5,285.78

Finding the Fourth Proportional to 13,612.70, 20,409.44 and 5,285.78

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Solution

The fourth proportional to 13,612.70, 20,409.44 and 5,285.78 is: 7,924.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.70 : 20,409.44 = 5,285.78 : x
  2. Step 2: Convert to fraction form
    13,612.70/20,409.44 = 5,285.78/x
  3. Step 3: Cross multiply
    13,612.70x = 20,409.44 × 5,285.78
  4. Step 4: Simplify right side
    13,612.70x = 107,879,720.93
  5. Step 5: Solve for x
    x = 107,879,720.93/13,612.70
  6. Step 6: Final answer
    x = 7,924.93

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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.